Compare 20639 vs 20643
| Property | 20639 | 20643 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 206391 | 31 × 71 × 9831 |
| Prime factorization | 20639 | 3 × 7 × 983 |
| Divisors count | 2 | 8 |
| Divisors | 1, 20639 | 1, 3, 7, 21, 983, 2949, 6881, 20643 |
| Number of properties | 4 | 0 |
| Chen primes | 1143rd | |
| Happy primes | 384th | |
| Primes | 2326th | |
| Twin primes (1st member) | 351st | |
| Roman numberals | ||
| Base 2 | 1010000100111112 | 1010000101000112 |
| Base 3 | 10010221023 | 10010221203 |
| Base 4 | 110021334 | 110022034 |
| Base 5 | 11300245 | 11300335 |
| Base 6 | 2353156 | 2353236 |
| Base 7 | 1141137 | 1141207 |
| Base 8 | 502378 | 502438 |
| Base 9 | 312729 | 312769 |
| Base 10 | 2063910 | 2064310 |
| Base 11 | 1456311 | 1456711 |
| Base 12 | bb3b12 | bb4312 |
| Base 13 | 951813 | 951c13 |
| Base 14 | 774314 | 774714 |
| Base 15 | 61ae15 | 61b315 |
| Base 16 | 509f16 | 50a316 |