Compare 21643 vs 21647
| Property | 21643 | 21647 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 231 × 9411 | 216471 |
| Prime factorization | 23 × 941 | 21647 |
| Divisors count | 4 | 2 |
| Divisors | 1, 23, 941, 21643 | 1, 21647 |
| Number of properties | 1 | 4 |
| Chen primes | 1193rd | |
| Long primes | 918th | |
| Primes | 2430th | |
| Semiprimes | 5470th | |
| Twin primes (1st member) | 370th | |
| Roman numberals | ||
| Base 2 | 1010100100010112 | 1010100100011112 |
| Base 3 | 10022001213 | 10022002023 |
| Base 4 | 111020234 | 111020334 |
| Base 5 | 11430335 | 11430425 |
| Base 6 | 2441116 | 2441156 |
| Base 7 | 1200467 | 1200537 |
| Base 8 | 522138 | 522178 |
| Base 9 | 326179 | 326229 |
| Base 10 | 2164310 | 2164710 |
| Base 11 | 1529611 | 1529a11 |
| Base 12 | 1063712 | 1063b12 |
| Base 13 | 9b0b13 | 9b1213 |
| Base 14 | 7c5d14 | 7c6314 |
| Base 15 | 662d15 | 663215 |
| Base 16 | 548b16 | 548f16 |