Ordinal Number 15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st Written in Words, Indicates Position or Order. Number Converted to Words in US American English in Eight Different Letter Cases

Ordinal number 15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st to (US) American English words

15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st: lowercase
all lowercase letters:

fifteen septennonagintillion one hundred sixty-six quinnonagintillion five hundred sixty-six quattuornonagintillion five hundred sixty-five trenonagintillion six hundred fifty-six duononagintillion six hundred fifty-six unnonagintillion five hundred thirty-two nonagintillion two hundred twenty-two novemoctogintillion two hundred twenty-two octooctogintillion two hundred twenty-two septenoctogintillion two hundred twenty-two sexoctogintillion two hundred twenty-five quinoctogintillion five hundred fifty-six quattuoroctogintillion five hundred sixty-five treoctogintillion six hundred fifty-six duooctogintillion five hundred sixty-five unoctogintillion six hundred sixty-five octogintillion six hundred fifty-six novemseptuagintillion five hundred sixty-five octoseptuagintillion six hundred sixty-five septenseptuagintillion six hundred fifty-six sexseptuagintillion five hundred thirty-one quinseptuagintillion three hundred thirteen quattuorseptuagintillion one hundred thirty-three treseptuagintillion one hundred thirty-one duoseptuagintillion three hundred twenty-three unseptuagintillion two hundred thirty-two septuagintillion three hundred thirty-two novemsexagintillion three hundred twenty-three octosexagintillion two hundred thirty-five septensexagintillion six hundred eighty-six sexsexagintillion five hundred sixty-five quinsexagintillion six hundred fifty-six quattuorsexagintillion five hundred sixty-five tresexagintillion three hundred fifty-three duosexagintillion five hundred thirty-five unsexagintillion three hundred thirty-five sexagintillion three hundred fifty-three novemquinquagintillion five hundred thirty-five octoquinquagintillion three hundred sixty-five septenquinquagintillion six hundred fifty-six sexquinquagintillion six hundred sixty-five quinquinquagintillion six hundred fifty-six quattuorquinquagintillion six hundred sixty-six trequinquagintillion five hundred sixty-five duoquinquagintillion six hundred fifty-six unquinquagintillion six hundred fifty-six quinquagintillion five hundred sixty-five novemquadragintillion six hundred fifty-three octoquadragintillion five hundred thirty-five septenquadragintillion three hundred thirty-three sexquadragintillion three hundred eighty-six quinquadragintillion eight hundred sixty-eight quattuorquadragintillion six hundred eighty-six trequadragintillion six hundred eighty-six duoquadragintillion four hundred sixty-four unquadragintillion six hundred sixty-four quadragintillion six hundred forty-six novemtrigintillion four hundred sixty-five octotrigintillion six hundred sixty-five septentrigintillion six hundred fifty-six sextrigintillion six hundred fifty-six quintrigintillion five hundred sixty-seven quattuortrigintillion six hundred fifty-six tretrigintillion five hundred sixty-five duotrigintillion six hundred fifty-six untrigintillion five hundred sixty-nine trigintillion eight hundred ninety-five novemvigintillion nine hundred eighty-nine octovigintillion nine hundred fifty-nine septenvigintillion five hundred ninety-eight sexvigintillion nine hundred ninety-eight quinvigintillion nine hundred eighty-nine quattuorvigintillion nine hundred fifty-nine trevigintillion five hundred sixty-five duovigintillion six hundred forty-six unvigintillion six hundred forty-six vigintillion five hundred sixty-five novemdecillion six hundred fifty-six octodecillion five hundred sixty-six septendecillion five hundred sixty-five sexdecillion six hundred fifty-six quindecillion eight hundred eighty-nine quattuordecillion eight hundred ninety-eight tredecillion six hundred forty-four duodecillion six hundred sixty-four undecillion four hundred sixty-four decillion six hundred sixty-five nonillion six hundred forty-six octillion four hundred sixty-six septillion four hundred sixty-seven sextillion six hundred sixty-four quintillion six hundred forty-six quadrillion four hundred sixty-three trillion four hundred thirty-four billion three hundred forty-six million five hundred sixty-six thousand five hundred first

15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st: UPPERCASE
ALL UPPERCASE LETTERS:

FIFTEEN SEPTENNONAGINTILLION ONE HUNDRED SIXTY-SIX QUINNONAGINTILLION FIVE HUNDRED SIXTY-SIX QUATTUORNONAGINTILLION FIVE HUNDRED SIXTY-FIVE TRENONAGINTILLION SIX HUNDRED FIFTY-SIX DUONONAGINTILLION SIX HUNDRED FIFTY-SIX UNNONAGINTILLION FIVE HUNDRED THIRTY-TWO NONAGINTILLION TWO HUNDRED TWENTY-TWO NOVEMOCTOGINTILLION TWO HUNDRED TWENTY-TWO OCTOOCTOGINTILLION TWO HUNDRED TWENTY-TWO SEPTENOCTOGINTILLION TWO HUNDRED TWENTY-TWO SEXOCTOGINTILLION TWO HUNDRED TWENTY-FIVE QUINOCTOGINTILLION FIVE HUNDRED FIFTY-SIX QUATTUOROCTOGINTILLION FIVE HUNDRED SIXTY-FIVE TREOCTOGINTILLION SIX HUNDRED FIFTY-SIX DUOOCTOGINTILLION FIVE HUNDRED SIXTY-FIVE UNOCTOGINTILLION SIX HUNDRED SIXTY-FIVE OCTOGINTILLION SIX HUNDRED FIFTY-SIX NOVEMSEPTUAGINTILLION FIVE HUNDRED SIXTY-FIVE OCTOSEPTUAGINTILLION SIX HUNDRED SIXTY-FIVE SEPTENSEPTUAGINTILLION SIX HUNDRED FIFTY-SIX SEXSEPTUAGINTILLION FIVE HUNDRED THIRTY-ONE QUINSEPTUAGINTILLION THREE HUNDRED THIRTEEN QUATTUORSEPTUAGINTILLION ONE HUNDRED THIRTY-THREE TRESEPTUAGINTILLION ONE HUNDRED THIRTY-ONE DUOSEPTUAGINTILLION THREE HUNDRED TWENTY-THREE UNSEPTUAGINTILLION TWO HUNDRED THIRTY-TWO SEPTUAGINTILLION THREE HUNDRED THIRTY-TWO NOVEMSEXAGINTILLION THREE HUNDRED TWENTY-THREE OCTOSEXAGINTILLION TWO HUNDRED THIRTY-FIVE SEPTENSEXAGINTILLION SIX HUNDRED EIGHTY-SIX SEXSEXAGINTILLION FIVE HUNDRED SIXTY-FIVE QUINSEXAGINTILLION SIX HUNDRED FIFTY-SIX QUATTUORSEXAGINTILLION FIVE HUNDRED SIXTY-FIVE TRESEXAGINTILLION THREE HUNDRED FIFTY-THREE DUOSEXAGINTILLION FIVE HUNDRED THIRTY-FIVE UNSEXAGINTILLION THREE HUNDRED THIRTY-FIVE SEXAGINTILLION THREE HUNDRED FIFTY-THREE NOVEMQUINQUAGINTILLION FIVE HUNDRED THIRTY-FIVE OCTOQUINQUAGINTILLION THREE HUNDRED SIXTY-FIVE SEPTENQUINQUAGINTILLION SIX HUNDRED FIFTY-SIX SEXQUINQUAGINTILLION SIX HUNDRED SIXTY-FIVE QUINQUINQUAGINTILLION SIX HUNDRED FIFTY-SIX QUATTUORQUINQUAGINTILLION SIX HUNDRED SIXTY-SIX TREQUINQUAGINTILLION FIVE HUNDRED SIXTY-FIVE DUOQUINQUAGINTILLION SIX HUNDRED FIFTY-SIX UNQUINQUAGINTILLION SIX HUNDRED FIFTY-SIX QUINQUAGINTILLION FIVE HUNDRED SIXTY-FIVE NOVEMQUADRAGINTILLION SIX HUNDRED FIFTY-THREE OCTOQUADRAGINTILLION FIVE HUNDRED THIRTY-FIVE SEPTENQUADRAGINTILLION THREE HUNDRED THIRTY-THREE SEXQUADRAGINTILLION THREE HUNDRED EIGHTY-SIX QUINQUADRAGINTILLION EIGHT HUNDRED SIXTY-EIGHT QUATTUORQUADRAGINTILLION SIX HUNDRED EIGHTY-SIX TREQUADRAGINTILLION SIX HUNDRED EIGHTY-SIX DUOQUADRAGINTILLION FOUR HUNDRED SIXTY-FOUR UNQUADRAGINTILLION SIX HUNDRED SIXTY-FOUR QUADRAGINTILLION SIX HUNDRED FORTY-SIX NOVEMTRIGINTILLION FOUR HUNDRED SIXTY-FIVE OCTOTRIGINTILLION SIX HUNDRED SIXTY-FIVE SEPTENTRIGINTILLION SIX HUNDRED FIFTY-SIX SEXTRIGINTILLION SIX HUNDRED FIFTY-SIX QUINTRIGINTILLION FIVE HUNDRED SIXTY-SEVEN QUATTUORTRIGINTILLION SIX HUNDRED FIFTY-SIX TRETRIGINTILLION FIVE HUNDRED SIXTY-FIVE DUOTRIGINTILLION SIX HUNDRED FIFTY-SIX UNTRIGINTILLION FIVE HUNDRED SIXTY-NINE TRIGINTILLION EIGHT HUNDRED NINETY-FIVE NOVEMVIGINTILLION NINE HUNDRED EIGHTY-NINE OCTOVIGINTILLION NINE HUNDRED FIFTY-NINE SEPTENVIGINTILLION FIVE HUNDRED NINETY-EIGHT SEXVIGINTILLION NINE HUNDRED NINETY-EIGHT QUINVIGINTILLION NINE HUNDRED EIGHTY-NINE QUATTUORVIGINTILLION NINE HUNDRED FIFTY-NINE TREVIGINTILLION FIVE HUNDRED SIXTY-FIVE DUOVIGINTILLION SIX HUNDRED FORTY-SIX UNVIGINTILLION SIX HUNDRED FORTY-SIX VIGINTILLION FIVE HUNDRED SIXTY-FIVE NOVEMDECILLION SIX HUNDRED FIFTY-SIX OCTODECILLION FIVE HUNDRED SIXTY-SIX SEPTENDECILLION FIVE HUNDRED SIXTY-FIVE SEXDECILLION SIX HUNDRED FIFTY-SIX QUINDECILLION EIGHT HUNDRED EIGHTY-NINE QUATTUORDECILLION EIGHT HUNDRED NINETY-EIGHT TREDECILLION SIX HUNDRED FORTY-FOUR DUODECILLION SIX HUNDRED SIXTY-FOUR UNDECILLION FOUR HUNDRED SIXTY-FOUR DECILLION SIX HUNDRED SIXTY-FIVE NONILLION SIX HUNDRED FORTY-SIX OCTILLION FOUR HUNDRED SIXTY-SIX SEPTILLION FOUR HUNDRED SIXTY-SEVEN SEXTILLION SIX HUNDRED SIXTY-FOUR QUINTILLION SIX HUNDRED FORTY-SIX QUADRILLION FOUR HUNDRED SIXTY-THREE TRILLION FOUR HUNDRED THIRTY-FOUR BILLION THREE HUNDRED FORTY-SIX MILLION FIVE HUNDRED SIXTY-SIX THOUSAND FIVE HUNDRED FIRST

15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st: Title Case
Capital Letters at the Beginning of Words:

Fifteen Septennonagintillion One Hundred Sixty-Six Quinnonagintillion Five Hundred Sixty-Six Quattuornonagintillion Five Hundred Sixty-Five Trenonagintillion Six Hundred Fifty-Six Duononagintillion Six Hundred Fifty-Six Unnonagintillion Five Hundred Thirty-Two Nonagintillion Two Hundred Twenty-Two Novemoctogintillion Two Hundred Twenty-Two Octooctogintillion Two Hundred Twenty-Two Septenoctogintillion Two Hundred Twenty-Two Sexoctogintillion Two Hundred Twenty-Five Quinoctogintillion Five Hundred Fifty-Six Quattuoroctogintillion Five Hundred Sixty-Five Treoctogintillion Six Hundred Fifty-Six Duooctogintillion Five Hundred Sixty-Five Unoctogintillion Six Hundred Sixty-Five Octogintillion Six Hundred Fifty-Six Novemseptuagintillion Five Hundred Sixty-Five Octoseptuagintillion Six Hundred Sixty-Five Septenseptuagintillion Six Hundred Fifty-Six Sexseptuagintillion Five Hundred Thirty-One Quinseptuagintillion Three Hundred Thirteen Quattuorseptuagintillion One Hundred Thirty-Three Treseptuagintillion One Hundred Thirty-One Duoseptuagintillion Three Hundred Twenty-Three Unseptuagintillion Two Hundred Thirty-Two Septuagintillion Three Hundred Thirty-Two Novemsexagintillion Three Hundred Twenty-Three Octosexagintillion Two Hundred Thirty-Five Septensexagintillion Six Hundred Eighty-Six Sexsexagintillion Five Hundred Sixty-Five Quinsexagintillion Six Hundred Fifty-Six Quattuorsexagintillion Five Hundred Sixty-Five Tresexagintillion Three Hundred Fifty-Three Duosexagintillion Five Hundred Thirty-Five Unsexagintillion Three Hundred Thirty-Five Sexagintillion Three Hundred Fifty-Three Novemquinquagintillion Five Hundred Thirty-Five Octoquinquagintillion Three Hundred Sixty-Five Septenquinquagintillion Six Hundred Fifty-Six Sexquinquagintillion Six Hundred Sixty-Five Quinquinquagintillion Six Hundred Fifty-Six Quattuorquinquagintillion Six Hundred Sixty-Six Trequinquagintillion Five Hundred Sixty-Five Duoquinquagintillion Six Hundred Fifty-Six Unquinquagintillion Six Hundred Fifty-Six Quinquagintillion Five Hundred Sixty-Five Novemquadragintillion Six Hundred Fifty-Three Octoquadragintillion Five Hundred Thirty-Five Septenquadragintillion Three Hundred Thirty-Three Sexquadragintillion Three Hundred Eighty-Six Quinquadragintillion Eight Hundred Sixty-Eight Quattuorquadragintillion Six Hundred Eighty-Six Trequadragintillion Six Hundred Eighty-Six Duoquadragintillion Four Hundred Sixty-Four Unquadragintillion Six Hundred Sixty-Four Quadragintillion Six Hundred Forty-Six Novemtrigintillion Four Hundred Sixty-Five Octotrigintillion Six Hundred Sixty-Five Septentrigintillion Six Hundred Fifty-Six Sextrigintillion Six Hundred Fifty-Six Quintrigintillion Five Hundred Sixty-Seven Quattuortrigintillion Six Hundred Fifty-Six Tretrigintillion Five Hundred Sixty-Five Duotrigintillion Six Hundred Fifty-Six Untrigintillion Five Hundred Sixty-Nine Trigintillion Eight Hundred Ninety-Five Novemvigintillion Nine Hundred Eighty-Nine Octovigintillion Nine Hundred Fifty-Nine Septenvigintillion Five Hundred Ninety-Eight Sexvigintillion Nine Hundred Ninety-Eight Quinvigintillion Nine Hundred Eighty-Nine Quattuorvigintillion Nine Hundred Fifty-Nine Trevigintillion Five Hundred Sixty-Five Duovigintillion Six Hundred Forty-Six Unvigintillion Six Hundred Forty-Six Vigintillion Five Hundred Sixty-Five Novemdecillion Six Hundred Fifty-Six Octodecillion Five Hundred Sixty-Six Septendecillion Five Hundred Sixty-Five Sexdecillion Six Hundred Fifty-Six Quindecillion Eight Hundred Eighty-Nine Quattuordecillion Eight Hundred Ninety-Eight Tredecillion Six Hundred Forty-Four Duodecillion Six Hundred Sixty-Four Undecillion Four Hundred Sixty-Four Decillion Six Hundred Sixty-Five Nonillion Six Hundred Forty-Six Octillion Four Hundred Sixty-Six Septillion Four Hundred Sixty-Seven Sextillion Six Hundred Sixty-Four Quintillion Six Hundred Forty-Six Quadrillion Four Hundred Sixty-Three Trillion Four Hundred Thirty-Four Billion Three Hundred Forty-Six Million Five Hundred Sixty-Six Thousand Five Hundred First

15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st: Sentence case
Capital letter to start the sentence:

Fifteen septennonagintillion one hundred sixty-six quinnonagintillion five hundred sixty-six quattuornonagintillion five hundred sixty-five trenonagintillion six hundred fifty-six duononagintillion six hundred fifty-six unnonagintillion five hundred thirty-two nonagintillion two hundred twenty-two novemoctogintillion two hundred twenty-two octooctogintillion two hundred twenty-two septenoctogintillion two hundred twenty-two sexoctogintillion two hundred twenty-five quinoctogintillion five hundred fifty-six quattuoroctogintillion five hundred sixty-five treoctogintillion six hundred fifty-six duooctogintillion five hundred sixty-five unoctogintillion six hundred sixty-five octogintillion six hundred fifty-six novemseptuagintillion five hundred sixty-five octoseptuagintillion six hundred sixty-five septenseptuagintillion six hundred fifty-six sexseptuagintillion five hundred thirty-one quinseptuagintillion three hundred thirteen quattuorseptuagintillion one hundred thirty-three treseptuagintillion one hundred thirty-one duoseptuagintillion three hundred twenty-three unseptuagintillion two hundred thirty-two septuagintillion three hundred thirty-two novemsexagintillion three hundred twenty-three octosexagintillion two hundred thirty-five septensexagintillion six hundred eighty-six sexsexagintillion five hundred sixty-five quinsexagintillion six hundred fifty-six quattuorsexagintillion five hundred sixty-five tresexagintillion three hundred fifty-three duosexagintillion five hundred thirty-five unsexagintillion three hundred thirty-five sexagintillion three hundred fifty-three novemquinquagintillion five hundred thirty-five octoquinquagintillion three hundred sixty-five septenquinquagintillion six hundred fifty-six sexquinquagintillion six hundred sixty-five quinquinquagintillion six hundred fifty-six quattuorquinquagintillion six hundred sixty-six trequinquagintillion five hundred sixty-five duoquinquagintillion six hundred fifty-six unquinquagintillion six hundred fifty-six quinquagintillion five hundred sixty-five novemquadragintillion six hundred fifty-three octoquadragintillion five hundred thirty-five septenquadragintillion three hundred thirty-three sexquadragintillion three hundred eighty-six quinquadragintillion eight hundred sixty-eight quattuorquadragintillion six hundred eighty-six trequadragintillion six hundred eighty-six duoquadragintillion four hundred sixty-four unquadragintillion six hundred sixty-four quadragintillion six hundred forty-six novemtrigintillion four hundred sixty-five octotrigintillion six hundred sixty-five septentrigintillion six hundred fifty-six sextrigintillion six hundred fifty-six quintrigintillion five hundred sixty-seven quattuortrigintillion six hundred fifty-six tretrigintillion five hundred sixty-five duotrigintillion six hundred fifty-six untrigintillion five hundred sixty-nine trigintillion eight hundred ninety-five novemvigintillion nine hundred eighty-nine octovigintillion nine hundred fifty-nine septenvigintillion five hundred ninety-eight sexvigintillion nine hundred ninety-eight quinvigintillion nine hundred eighty-nine quattuorvigintillion nine hundred fifty-nine trevigintillion five hundred sixty-five duovigintillion six hundred forty-six unvigintillion six hundred forty-six vigintillion five hundred sixty-five novemdecillion six hundred fifty-six octodecillion five hundred sixty-six septendecillion five hundred sixty-five sexdecillion six hundred fifty-six quindecillion eight hundred eighty-nine quattuordecillion eight hundred ninety-eight tredecillion six hundred forty-four duodecillion six hundred sixty-four undecillion four hundred sixty-four decillion six hundred sixty-five nonillion six hundred forty-six octillion four hundred sixty-six septillion four hundred sixty-seven sextillion six hundred sixty-four quintillion six hundred forty-six quadrillion four hundred sixty-three trillion four hundred thirty-four billion three hundred forty-six million five hundred sixty-six thousand five hundred first


15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st: Start Case
Capital Letters At The Beginning Of All Words:

Fifteen Septennonagintillion One Hundred Sixty-Six Quinnonagintillion Five Hundred Sixty-Six Quattuornonagintillion Five Hundred Sixty-Five Trenonagintillion Six Hundred Fifty-Six Duononagintillion Six Hundred Fifty-Six Unnonagintillion Five Hundred Thirty-Two Nonagintillion Two Hundred Twenty-Two Novemoctogintillion Two Hundred Twenty-Two Octooctogintillion Two Hundred Twenty-Two Septenoctogintillion Two Hundred Twenty-Two Sexoctogintillion Two Hundred Twenty-Five Quinoctogintillion Five Hundred Fifty-Six Quattuoroctogintillion Five Hundred Sixty-Five Treoctogintillion Six Hundred Fifty-Six Duooctogintillion Five Hundred Sixty-Five Unoctogintillion Six Hundred Sixty-Five Octogintillion Six Hundred Fifty-Six Novemseptuagintillion Five Hundred Sixty-Five Octoseptuagintillion Six Hundred Sixty-Five Septenseptuagintillion Six Hundred Fifty-Six Sexseptuagintillion Five Hundred Thirty-One Quinseptuagintillion Three Hundred Thirteen Quattuorseptuagintillion One Hundred Thirty-Three Treseptuagintillion One Hundred Thirty-One Duoseptuagintillion Three Hundred Twenty-Three Unseptuagintillion Two Hundred Thirty-Two Septuagintillion Three Hundred Thirty-Two Novemsexagintillion Three Hundred Twenty-Three Octosexagintillion Two Hundred Thirty-Five Septensexagintillion Six Hundred Eighty-Six Sexsexagintillion Five Hundred Sixty-Five Quinsexagintillion Six Hundred Fifty-Six Quattuorsexagintillion Five Hundred Sixty-Five Tresexagintillion Three Hundred Fifty-Three Duosexagintillion Five Hundred Thirty-Five Unsexagintillion Three Hundred Thirty-Five Sexagintillion Three Hundred Fifty-Three Novemquinquagintillion Five Hundred Thirty-Five Octoquinquagintillion Three Hundred Sixty-Five Septenquinquagintillion Six Hundred Fifty-Six Sexquinquagintillion Six Hundred Sixty-Five Quinquinquagintillion Six Hundred Fifty-Six Quattuorquinquagintillion Six Hundred Sixty-Six Trequinquagintillion Five Hundred Sixty-Five Duoquinquagintillion Six Hundred Fifty-Six Unquinquagintillion Six Hundred Fifty-Six Quinquagintillion Five Hundred Sixty-Five Novemquadragintillion Six Hundred Fifty-Three Octoquadragintillion Five Hundred Thirty-Five Septenquadragintillion Three Hundred Thirty-Three Sexquadragintillion Three Hundred Eighty-Six Quinquadragintillion Eight Hundred Sixty-Eight Quattuorquadragintillion Six Hundred Eighty-Six Trequadragintillion Six Hundred Eighty-Six Duoquadragintillion Four Hundred Sixty-Four Unquadragintillion Six Hundred Sixty-Four Quadragintillion Six Hundred Forty-Six Novemtrigintillion Four Hundred Sixty-Five Octotrigintillion Six Hundred Sixty-Five Septentrigintillion Six Hundred Fifty-Six Sextrigintillion Six Hundred Fifty-Six Quintrigintillion Five Hundred Sixty-Seven Quattuortrigintillion Six Hundred Fifty-Six Tretrigintillion Five Hundred Sixty-Five Duotrigintillion Six Hundred Fifty-Six Untrigintillion Five Hundred Sixty-Nine Trigintillion Eight Hundred Ninety-Five Novemvigintillion Nine Hundred Eighty-Nine Octovigintillion Nine Hundred Fifty-Nine Septenvigintillion Five Hundred Ninety-Eight Sexvigintillion Nine Hundred Ninety-Eight Quinvigintillion Nine Hundred Eighty-Nine Quattuorvigintillion Nine Hundred Fifty-Nine Trevigintillion Five Hundred Sixty-Five Duovigintillion Six Hundred Forty-Six Unvigintillion Six Hundred Forty-Six Vigintillion Five Hundred Sixty-Five Novemdecillion Six Hundred Fifty-Six Octodecillion Five Hundred Sixty-Six Septendecillion Five Hundred Sixty-Five Sexdecillion Six Hundred Fifty-Six Quindecillion Eight Hundred Eighty-Nine Quattuordecillion Eight Hundred Ninety-Eight Tredecillion Six Hundred Forty-Four Duodecillion Six Hundred Sixty-Four Undecillion Four Hundred Sixty-Four Decillion Six Hundred Sixty-Five Nonillion Six Hundred Forty-Six Octillion Four Hundred Sixty-Six Septillion Four Hundred Sixty-Seven Sextillion Six Hundred Sixty-Four Quintillion Six Hundred Forty-Six Quadrillion Four Hundred Sixty-Three Trillion Four Hundred Thirty-Four Billion Three Hundred Forty-Six Million Five Hundred Sixty-Six Thousand Five Hundred First

15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st: camelCase
Spaces and punctuation removed,
first letter lower case,
subsequent words first letters uppercase:

fifteenSeptennonagintillionOneHundredSixtySixQuinnonagintillionFiveHundredSixtySixQuattuornonagintillionFiveHundredSixtyFiveTrenonagintillionSixHundredFiftySixDuononagintillionSixHundredFiftySixUnnonagintillionFiveHundredThirtyTwoNonagintillionTwoHundredTwentyTwoNovemoctogintillionTwoHundredTwentyTwoOctooctogintillionTwoHundredTwentyTwoSeptenoctogintillionTwoHundredTwentyTwoSexoctogintillionTwoHundredTwentyFiveQuinoctogintillionFiveHundredFiftySixQuattuoroctogintillionFiveHundredSixtyFiveTreoctogintillionSixHundredFiftySixDuooctogintillionFiveHundredSixtyFiveUnoctogintillionSixHundredSixtyFiveOctogintillionSixHundredFiftySixNovemseptuagintillionFiveHundredSixtyFiveOctoseptuagintillionSixHundredSixtyFiveSeptenseptuagintillionSixHundredFiftySixSexseptuagintillionFiveHundredThirtyOneQuinseptuagintillionThreeHundredThirteenQuattuorseptuagintillionOneHundredThirtyThreeTreseptuagintillionOneHundredThirtyOneDuoseptuagintillionThreeHundredTwentyThreeUnseptuagintillionTwoHundredThirtyTwoSeptuagintillionThreeHundredThirtyTwoNovemsexagintillionThreeHundredTwentyThreeOctosexagintillionTwoHundredThirtyFiveSeptensexagintillionSixHundredEightySixSexsexagintillionFiveHundredSixtyFiveQuinsexagintillionSixHundredFiftySixQuattuorsexagintillionFiveHundredSixtyFiveTresexagintillionThreeHundredFiftyThreeDuosexagintillionFiveHundredThirtyFiveUnsexagintillionThreeHundredThirtyFiveSexagintillionThreeHundredFiftyThreeNovemquinquagintillionFiveHundredThirtyFiveOctoquinquagintillionThreeHundredSixtyFiveSeptenquinquagintillionSixHundredFiftySixSexquinquagintillionSixHundredSixtyFiveQuinquinquagintillionSixHundredFiftySixQuattuorquinquagintillionSixHundredSixtySixTrequinquagintillionFiveHundredSixtyFiveDuoquinquagintillionSixHundredFiftySixUnquinquagintillionSixHundredFiftySixQuinquagintillionFiveHundredSixtyFiveNovemquadragintillionSixHundredFiftyThreeOctoquadragintillionFiveHundredThirtyFiveSeptenquadragintillionThreeHundredThirtyThreeSexquadragintillionThreeHundredEightySixQuinquadragintillionEightHundredSixtyEightQuattuorquadragintillionSixHundredEightySixTrequadragintillionSixHundredEightySixDuoquadragintillionFourHundredSixtyFourUnquadragintillionSixHundredSixtyFourQuadragintillionSixHundredFortySixNovemtrigintillionFourHundredSixtyFiveOctotrigintillionSixHundredSixtyFiveSeptentrigintillionSixHundredFiftySixSextrigintillionSixHundredFiftySixQuintrigintillionFiveHundredSixtySevenQuattuortrigintillionSixHundredFiftySixTretrigintillionFiveHundredSixtyFiveDuotrigintillionSixHundredFiftySixUntrigintillionFiveHundredSixtyNineTrigintillionEightHundredNinetyFiveNovemvigintillionNineHundredEightyNineOctovigintillionNineHundredFiftyNineSeptenvigintillionFiveHundredNinetyEightSexvigintillionNineHundredNinetyEightQuinvigintillionNineHundredEightyNineQuattuorvigintillionNineHundredFiftyNineTrevigintillionFiveHundredSixtyFiveDuovigintillionSixHundredFortySixUnvigintillionSixHundredFortySixVigintillionFiveHundredSixtyFiveNovemdecillionSixHundredFiftySixOctodecillionFiveHundredSixtySixSeptendecillionFiveHundredSixtyFiveSexdecillionSixHundredFiftySixQuindecillionEightHundredEightyNineQuattuordecillionEightHundredNinetyEightTredecillionSixHundredFortyFourDuodecillionSixHundredSixtyFourUndecillionFourHundredSixtyFourDecillionSixHundredSixtyFiveNonillionSixHundredFortySixOctillionFourHundredSixtySixSeptillionFourHundredSixtySevenSextillionSixHundredSixtyFourQuintillionSixHundredFortySixQuadrillionFourHundredSixtyThreeTrillionFourHundredThirtyFourBillionThreeHundredFortySixMillionFiveHundredSixtySixThousandFiveHundredFirst

15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st: hyphen-case
punctuation - removed
spaces - replaced - by - hyphens:

fifteen-septennonagintillion-one-hundred-sixty-six-quinnonagintillion-five-hundred-sixty-six-quattuornonagintillion-five-hundred-sixty-five-trenonagintillion-six-hundred-fifty-six-duononagintillion-six-hundred-fifty-six-unnonagintillion-five-hundred-thirty-two-nonagintillion-two-hundred-twenty-two-novemoctogintillion-two-hundred-twenty-two-octooctogintillion-two-hundred-twenty-two-septenoctogintillion-two-hundred-twenty-two-sexoctogintillion-two-hundred-twenty-five-quinoctogintillion-five-hundred-fifty-six-quattuoroctogintillion-five-hundred-sixty-five-treoctogintillion-six-hundred-fifty-six-duooctogintillion-five-hundred-sixty-five-unoctogintillion-six-hundred-sixty-five-octogintillion-six-hundred-fifty-six-novemseptuagintillion-five-hundred-sixty-five-octoseptuagintillion-six-hundred-sixty-five-septenseptuagintillion-six-hundred-fifty-six-sexseptuagintillion-five-hundred-thirty-one-quinseptuagintillion-three-hundred-thirteen-quattuorseptuagintillion-one-hundred-thirty-three-treseptuagintillion-one-hundred-thirty-one-duoseptuagintillion-three-hundred-twenty-three-unseptuagintillion-two-hundred-thirty-two-septuagintillion-three-hundred-thirty-two-novemsexagintillion-three-hundred-twenty-three-octosexagintillion-two-hundred-thirty-five-septensexagintillion-six-hundred-eighty-six-sexsexagintillion-five-hundred-sixty-five-quinsexagintillion-six-hundred-fifty-six-quattuorsexagintillion-five-hundred-sixty-five-tresexagintillion-three-hundred-fifty-three-duosexagintillion-five-hundred-thirty-five-unsexagintillion-three-hundred-thirty-five-sexagintillion-three-hundred-fifty-three-novemquinquagintillion-five-hundred-thirty-five-octoquinquagintillion-three-hundred-sixty-five-septenquinquagintillion-six-hundred-fifty-six-sexquinquagintillion-six-hundred-sixty-five-quinquinquagintillion-six-hundred-fifty-six-quattuorquinquagintillion-six-hundred-sixty-six-trequinquagintillion-five-hundred-sixty-five-duoquinquagintillion-six-hundred-fifty-six-unquinquagintillion-six-hundred-fifty-six-quinquagintillion-five-hundred-sixty-five-novemquadragintillion-six-hundred-fifty-three-octoquadragintillion-five-hundred-thirty-five-septenquadragintillion-three-hundred-thirty-three-sexquadragintillion-three-hundred-eighty-six-quinquadragintillion-eight-hundred-sixty-eight-quattuorquadragintillion-six-hundred-eighty-six-trequadragintillion-six-hundred-eighty-six-duoquadragintillion-four-hundred-sixty-four-unquadragintillion-six-hundred-sixty-four-quadragintillion-six-hundred-forty-six-novemtrigintillion-four-hundred-sixty-five-octotrigintillion-six-hundred-sixty-five-septentrigintillion-six-hundred-fifty-six-sextrigintillion-six-hundred-fifty-six-quintrigintillion-five-hundred-sixty-seven-quattuortrigintillion-six-hundred-fifty-six-tretrigintillion-five-hundred-sixty-five-duotrigintillion-six-hundred-fifty-six-untrigintillion-five-hundred-sixty-nine-trigintillion-eight-hundred-ninety-five-novemvigintillion-nine-hundred-eighty-nine-octovigintillion-nine-hundred-fifty-nine-septenvigintillion-five-hundred-ninety-eight-sexvigintillion-nine-hundred-ninety-eight-quinvigintillion-nine-hundred-eighty-nine-quattuorvigintillion-nine-hundred-fifty-nine-trevigintillion-five-hundred-sixty-five-duovigintillion-six-hundred-forty-six-unvigintillion-six-hundred-forty-six-vigintillion-five-hundred-sixty-five-novemdecillion-six-hundred-fifty-six-octodecillion-five-hundred-sixty-six-septendecillion-five-hundred-sixty-five-sexdecillion-six-hundred-fifty-six-quindecillion-eight-hundred-eighty-nine-quattuordecillion-eight-hundred-ninety-eight-tredecillion-six-hundred-forty-four-duodecillion-six-hundred-sixty-four-undecillion-four-hundred-sixty-four-decillion-six-hundred-sixty-five-nonillion-six-hundred-forty-six-octillion-four-hundred-sixty-six-septillion-four-hundred-sixty-seven-sextillion-six-hundred-sixty-four-quintillion-six-hundred-forty-six-quadrillion-four-hundred-sixty-three-trillion-four-hundred-thirty-four-billion-three-hundred-forty-six-million-five-hundred-sixty-six-thousand-five-hundred-first

15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st: snake_case
punctuation _ removed
spaces _ replaced _ by _ underscores:

fifteen_septennonagintillion_one_hundred_sixty_six_quinnonagintillion_five_hundred_sixty_six_quattuornonagintillion_five_hundred_sixty_five_trenonagintillion_six_hundred_fifty_six_duononagintillion_six_hundred_fifty_six_unnonagintillion_five_hundred_thirty_two_nonagintillion_two_hundred_twenty_two_novemoctogintillion_two_hundred_twenty_two_octooctogintillion_two_hundred_twenty_two_septenoctogintillion_two_hundred_twenty_two_sexoctogintillion_two_hundred_twenty_five_quinoctogintillion_five_hundred_fifty_six_quattuoroctogintillion_five_hundred_sixty_five_treoctogintillion_six_hundred_fifty_six_duooctogintillion_five_hundred_sixty_five_unoctogintillion_six_hundred_sixty_five_octogintillion_six_hundred_fifty_six_novemseptuagintillion_five_hundred_sixty_five_octoseptuagintillion_six_hundred_sixty_five_septenseptuagintillion_six_hundred_fifty_six_sexseptuagintillion_five_hundred_thirty_one_quinseptuagintillion_three_hundred_thirteen_quattuorseptuagintillion_one_hundred_thirty_three_treseptuagintillion_one_hundred_thirty_one_duoseptuagintillion_three_hundred_twenty_three_unseptuagintillion_two_hundred_thirty_two_septuagintillion_three_hundred_thirty_two_novemsexagintillion_three_hundred_twenty_three_octosexagintillion_two_hundred_thirty_five_septensexagintillion_six_hundred_eighty_six_sexsexagintillion_five_hundred_sixty_five_quinsexagintillion_six_hundred_fifty_six_quattuorsexagintillion_five_hundred_sixty_five_tresexagintillion_three_hundred_fifty_three_duosexagintillion_five_hundred_thirty_five_unsexagintillion_three_hundred_thirty_five_sexagintillion_three_hundred_fifty_three_novemquinquagintillion_five_hundred_thirty_five_octoquinquagintillion_three_hundred_sixty_five_septenquinquagintillion_six_hundred_fifty_six_sexquinquagintillion_six_hundred_sixty_five_quinquinquagintillion_six_hundred_fifty_six_quattuorquinquagintillion_six_hundred_sixty_six_trequinquagintillion_five_hundred_sixty_five_duoquinquagintillion_six_hundred_fifty_six_unquinquagintillion_six_hundred_fifty_six_quinquagintillion_five_hundred_sixty_five_novemquadragintillion_six_hundred_fifty_three_octoquadragintillion_five_hundred_thirty_five_septenquadragintillion_three_hundred_thirty_three_sexquadragintillion_three_hundred_eighty_six_quinquadragintillion_eight_hundred_sixty_eight_quattuorquadragintillion_six_hundred_eighty_six_trequadragintillion_six_hundred_eighty_six_duoquadragintillion_four_hundred_sixty_four_unquadragintillion_six_hundred_sixty_four_quadragintillion_six_hundred_forty_six_novemtrigintillion_four_hundred_sixty_five_octotrigintillion_six_hundred_sixty_five_septentrigintillion_six_hundred_fifty_six_sextrigintillion_six_hundred_fifty_six_quintrigintillion_five_hundred_sixty_seven_quattuortrigintillion_six_hundred_fifty_six_tretrigintillion_five_hundred_sixty_five_duotrigintillion_six_hundred_fifty_six_untrigintillion_five_hundred_sixty_nine_trigintillion_eight_hundred_ninety_five_novemvigintillion_nine_hundred_eighty_nine_octovigintillion_nine_hundred_fifty_nine_septenvigintillion_five_hundred_ninety_eight_sexvigintillion_nine_hundred_ninety_eight_quinvigintillion_nine_hundred_eighty_nine_quattuorvigintillion_nine_hundred_fifty_nine_trevigintillion_five_hundred_sixty_five_duovigintillion_six_hundred_forty_six_unvigintillion_six_hundred_forty_six_vigintillion_five_hundred_sixty_five_novemdecillion_six_hundred_fifty_six_octodecillion_five_hundred_sixty_six_septendecillion_five_hundred_sixty_five_sexdecillion_six_hundred_fifty_six_quindecillion_eight_hundred_eighty_nine_quattuordecillion_eight_hundred_ninety_eight_tredecillion_six_hundred_forty_four_duodecillion_six_hundred_sixty_four_undecillion_four_hundred_sixty_four_decillion_six_hundred_sixty_five_nonillion_six_hundred_forty_six_octillion_four_hundred_sixty_six_septillion_four_hundred_sixty_seven_sextillion_six_hundred_sixty_four_quintillion_six_hundred_forty_six_quadrillion_four_hundred_sixty_three_trillion_four_hundred_thirty_four_billion_three_hundred_forty_six_million_five_hundred_sixty_six_thousand_five_hundred_first


Ordinal number 15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501st written in: 'lowercase', 'UPPERCASE', 'Title Case', 'Sentence case', 'Start Case', 'camelCase', 'hyphen-case' and 'snake_case'.

Notes on Letter Cases used to write out in words the number above:

1: Lowercase: only lowercase letters are used. Example: 'seventy-six and two tenths'.


2: Uppercase: only uppercase letters are used. Example: 'SEVENTY-SIX AND TWO TENTHS'.


3. Title Case: first letter of each word is capitalized, except for certain short words, such as articles, conjunctions and short prepositions, 'a', 'an', 'the', 'and', 'but', 'for', 'at', 'by', 'to', 'or', 'in', etc. Example: 'Seventy-Six and Two Tenths'.


4. Sentence case: only the first letter of the first word is capitalized. Example: 'Seventy-six and two tenths'.


5. Start Case: first letter of each word is capitalized without exception. Example: 'Seventy-Six And Two Tenths'.


6. Camel Case: text has no spaces nor punctuation and first letter of each word is capitalized except for the very first letter in the series. Example: 'seventySixAndTwoTenths'.

Pascal Case: See the Camel Case above, but the first letter is also capitalized. Example: 'SeventySixAndTwoTenths'.


7. Hyphen Case: text has no spaces nor punctuation and the words are delimited by hyphen. Example: 'seventy-six-and-two-tenths'. Hyphen Case can be lowercase or uppercase.


8. Snake Case: text has no spaces nor punctuation and the words are delimited by underscore. Example: 'seventy_six_and_two_tenths'. Snake Case can be lowercase or uppercase.


Notes on Writing Out Numbers:

1: It's correct to hyphenate all compound numbers from twenty-one (21) through ninety-nine (99). The hyphen is the minus sign, as in 'thirty-four' (34).


2: In American English, unlike British English, when writing out natural numbers of three or more digits, the word 'and' is not used after 'hundred' or 'thousand': so it is 'one thousand two hundred thirty-four' and not 'one thousand two hundred and thirty-four'.


3. Do not use commas when writing out in words numbers above 999: so it is 'one thousand two hundred thirty-four' and not 'one thousand, two hundred thirty-four'.


4. Use commas when writing in digits numbers above 999: 1,234; 43,290, etc.


More operations of this kind:



Converter: Write Out Ordinal Numbers in Words in (US) American English

The ordinal numbers are converted to words in (US) American English in:

(1) lowercase (2) UPPERCASE (3) Title Case (4) Sentence case (5) Start Case (6) camelCase (7) Hyphen-Case (8) Snake_Case.

Latest ordinal numbers converted to words in US American English

convert ordinal number 15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 501 to (US) American English words Jul 24 00:36 UTC (GMT)
convert ordinal number 203,923 to (US) American English words Jul 24 00:36 UTC (GMT)
convert ordinal number 8 777 777 777 777 777 798 729 487 532 498 705 742 378 590 478 239 542 354 235 243 543 254 235 432 542 354 235 437 777 777 777 778 777 777 777 777 777 777 777 777 777 777 777 778 777 777 777 777 777 777 777 777 777 777 777 777 777 777 777 752 to (US) American English words Jul 24 00:36 UTC (GMT)
convert ordinal number 8,426 to (US) American English words Jul 24 00:35 UTC (GMT)
convert ordinal number 1,450,024,365 to (US) American English words Jul 24 00:34 UTC (GMT)
convert ordinal number 9,283,475,239,458,720,346 to (US) American English words Jul 24 00:34 UTC (GMT)
convert ordinal number 78,857 to (US) American English words Jul 24 00:34 UTC (GMT)
convert ordinal number 53,821,059 to (US) American English words Jul 24 00:34 UTC (GMT)
convert ordinal number 5,553,664 to (US) American English words Jul 24 00:34 UTC (GMT)
convert ordinal number 35,006 to (US) American English words Jul 24 00:34 UTC (GMT)
convert ordinal number 2,721 to (US) American English words Jul 24 00:33 UTC (GMT)
convert ordinal number 26 to (US) American English words Jul 24 00:33 UTC (GMT)
convert ordinal number 8 777 777 777 777 777 798 729 487 532 498 705 742 378 590 478 239 542 354 235 243 543 254 235 432 542 354 235 437 777 777 777 778 777 777 777 777 777 777 777 777 777 777 777 778 777 777 777 777 777 777 777 777 777 777 777 777 777 777 777 752 to (US) American English words Jul 24 00:32 UTC (GMT)
All users converted ordinal numbers

How to convert ordinal numerals to words in (US) American English, how to write them out using letters instead of numerals

How to write out ordinal numbers (those denoting order) in words?

Most ordinal numbers end in "th", so just add "th" to the end of the cardinal number (those denoting quantity, ex: 1 one, 2 two, 3 three, 4 four, ... etc.):

  • cardinal: 4 = four -> ordinal: 4th = fourth
  • cardinal: 7 = seven -> ordinal: 7th = seventh
  • cardinal: 10 = ten -> ordinal: 10th = tenth
  • cardinal: 19 = nineteen -> ordinal: 19th = nineteenth
  • cardinal: 100 = one hundred -> ordinal: 100th = (one) hundredth
  • cardinal: 1,000 = one thousand -> ordinal: 1,000th = (one) thousandth

Exceptions:

  • cardinal: 1 = one -> ordinal: first = 1st
  • cardinal: 2 = two -> ordinal: second = 2nd
  • cardinal: 3 = three -> ordinal: third = 3rd
  • cardinal: 5 = five -> ordinal: fifth = 5th
  • cardinal: 8 = eight -> ordinal: eighth = 8th
  • cardinal: 9 = nine -> ordinal: ninth = 9th
  • cardinal: 12 = twelve -> ordinal: twelfth = 12th
  • cardinal: 20 = twenty -> ordinal: twentieth = 20th
  • cardinal: 30 = thirty -> ordinal: thirtieth = 30th
  • cardinal: 40 = forty -> ordinal: fortieth = 40th
  • cardinal: 50 = fifty -> ordinal: fiftieth = 50th
  • cardinal: 60 = sixty -> ordinal: sixtieth = 60th
  • cardinal: 70 = seventy -> ordinal: seventieth = 70th
  • cardinal: 80 = eighty -> ordinal: eightieth = 80th
  • cardinal: 90 = ninety -> ordinal: ninetieth = 90th

Full article: how to write out ordinal numbers in words in (US) American English, using letters instead of numerals

Here there are a couple of the main ordinal numbers, from 1st up to 19th, you can find a longer list in the full article:

  • cardinal: 1 = one;
    ordinal: 1st = first;
  • cardinal: 2 = two;
    ordinal: 2nd, second;
  • cardinal: 3 = three;
    ordinal: 3rd, third;
  • cardinal: 4 = four;
    ordinal: 4th, fourth;
  • cardinal: 5 = five;
    ordinal: 5th, fifth;
  • cardinal: 6 = six;
    ordinal: 6th, sixth;
  • cardinal: 7 = seven;
    ordinal: 7th, seventh;
  • cardinal: 8 = eight;
    ordinal: 8th, eighth;
  • cardinal: 9 = nine;
    ordinal: 9th, ninth;
  • cardinal: 10 = ten;
    ordinal: 10th, tenth;
  • cardinal: 11 = eleven;
    ordinal: 11th, eleventh;
  • cardinal: 12 = twelve;
    ordinal: 12th, twelfth;
  • cardinal: 13 = thirteen;
    ordinal: thirteenth;
  • cardinal: 14 = fourteen;
    ordinal: 14th, fourteenth;
  • cardinal: 15 = fifteen;
    ordinal: 15th, fifteenth;
  • cardinal: 16 = sixteen;
    ordinal: 16th, sixteenth;
  • cardinal: 17 = seventeen;
    ordinal: 17th, seventeenth;
  • cardinal: 18 = eighteen;
    ordinal: 18th, eighteenth;
  • cardinal: 19 = nineteen;
    ordinal: 19th, nineteenth;

Full article: how to write out ordinal numbers in words in (US) American English, using letters instead of numerals