Compare 20639 vs 20981
| Property | 20639 | 20981 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 206391 | 209811 |
| Prime factorization | 20639 | 20981 |
| Divisors count | 2 | 2 |
| Divisors | 1, 20639 | 1, 20981 |
| Number of properties | 4 | 5 |
| Chen primes | 1143rd | 1161st |
| Good primes | 265th | |
| Happy primes | 384th | |
| Primes | 2326th | 2359th |
| Pythagorean primes | 1172nd | |
| Twin primes (1st member) | 351st | 357th |
| Roman numberals | ||
| Base 2 | 1010000100111112 | 1010001111101012 |
| Base 3 | 10010221023 | 10012100023 |
| Base 4 | 110021334 | 110133114 |
| Base 5 | 11300245 | 11324115 |
| Base 6 | 2353156 | 2410456 |
| Base 7 | 1141137 | 1151127 |
| Base 8 | 502378 | 507658 |
| Base 9 | 312729 | 317029 |
| Base 10 | 2063910 | 2098110 |
| Base 11 | 1456311 | 1484411 |
| Base 12 | bb3b12 | 1018512 |
| Base 13 | 951813 | 971c13 |
| Base 14 | 774314 | 790914 |
| Base 15 | 61ae15 | 633b15 |
| Base 16 | 509f16 | 51f516 |