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23 in Roman Numerals

How to write the number 23 in Roman numerals, with the full place-value breakdown.

The number 23 in Roman numerals

XXIII

Place-value breakdown

23 = 20 + 3, so XXIII = XX + III. Roman numerals are written from largest to smallest value, left to right:

PlaceValueRomanRule
Tens20XXAdditive rule: XX = 20 (symbols are simply added)
Ones3IIIAdditive rule: III = 3 (symbols are simply added)

About the number 23

The number 23 is written XXIII in Roman numerals.

Looking for the ordinal form — "23rd in Roman numerals"? Roman notation makes no distinction between cardinal and ordinal numbers, so "23rd" is also written XXIII.

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Roman numeral

XXIII

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