Nearby numbers
| Number | Roman numeral |
|---|
| 16 | XVI |
| 17 | XVII |
| 18 | XVIII |
| 19 | XIX |
| 20 | XX |
| 21 ◀ | XXI |
| 22 | XXII |
| 23 | XXIII |
| 24 | XXIV |
| 25 | XXV |
| 26 | XXVI |
Frequently Asked Questions
What is 21 in Roman numerals?+
21 in Roman numerals is XXI.
How are Roman numerals constructed?+
Roman numerals use letters: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Subtractive notation is used for 4 (IV), 9 (IX), 40 (XL), 90 (XC), 400 (CD), 900 (CM).
What is XX in numbers?+
XX = 20.
What is the largest Roman numeral?+
The largest standard Roman numeral is MMMCMXCIX = 3999.