What is the number 21?
The number 21 is an odd number that comes just after 20 and right before 22. It is not a prime number because it can be evenly divided by 3 and 7, in addition to 1 and itself. In American politics, Chester A. Arthur was the 21st president of the United States. He served from 1881 to 1885 and is remembered for reforming the civil service system. In games, 21 is the target score in blackjack, one of the most popular card games in the world. In science, 21 is the atomic number of scandium, a metal used in aerospace components and sporting goods like baseball bats and bicycle frames.
Number 21 in different languages
- English: Twenty-one
- French: Vingt et un
- Spanish: Veintiuno
- Arabic: واحد وعشرون
- German: Einundzwanzig
- Chinese: 二十一
- Japanese: 二十一
- Korean: 스물하나
- Portuguese: Vinte e um
- Italian: Ventuno
- Hindi: इक्कीस
- Russian: Двадцать один
- Turkish: Yirmi bir