21 times 23 is 483. In symbols: 21 × 23 = 483, and 23 × 21 = 483 too.
21 × 23 means adding 21 to itself 23 times: that is 23 copies of 21, which add up to 483.
21, 42, 63, 84, 105, 126, 147, 168, 189, 210, 231, 252, ... (keep going to the 23th multiple). The 23th multiple of 21 is 483.
21 × 23 = 21 × 20 + 21 × 3 = 420 + 63 = 483.
483 ÷ 21 = 23
483 ÷ 23 = 21
483 is odd. Prime factorization: 3 × 7 × 23.
| Multiplication | Answer |
|---|---|
| 20 × 23 | 460 |
| 22 × 23 | 506 |
| 21 × 22 | 462 |
| 21 × 24 | 504 |
| 21 × 25 | 525 |
| 21 × 21 | 441 |
| 23 × 23 | 529 |
| 19 × 23 | 437 |
Other numbers? Browse the multiplication table, the squares and cubes or the exponent calculator.