20 = XX
20 in Roman numerals is XX.
Twenty written with the letters X X.
20 in words: Twenty
Twenty in Roman numerals is XX. It is short enough to write from memory once you know the pattern, and it turns up constantly on watch dials, book chapters and film sequels.
Everything in XX is additive here, so you simply add each letter's value together. Numbers like this are a good place to get comfortable before tackling the subtractive forms such as IV and IX.
How 20 breaks down
Reading XX from left to right, each group is added together to reach 20:
| Group | Value | Place |
|---|---|---|
| XX | 20 | tens |
| XX | 20 | total |
Frequently asked questions
What is 20 in Roman numerals?
20 in Roman numerals is XX.
How do you write 20 in words?
20 is written "Twenty" in English.
What number comes before XX?
The number before XX is 19, written XIX in Roman numerals.
What number comes after XX?
The number after XX is 21, written XXI in Roman numerals.
Related numbers
Last updated July 22, 2026. Reviewed for accuracy against the standard rules for Roman numerals.