Compare 21863 vs 21991
| Property | 21863 | 21991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 218631 | 219911 |
| Prime factorization | 21863 | 21991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21863 | 1, 21991 |
| Number of properties | 7 | 5 |
| Chen primes | 1203rd | 1208th |
| Cousin primes (2nd member) | 373rd | |
| Harmonic primes | 904th | |
| Isolated primes | 1710th | 1720th |
| Long primes | 929th | |
| Primes | 2453rd | 2463rd |
| Sexy primes (1st member) | 742nd | |
| Sexy prime triplets (1st member) | 202nd | |
| Ulam primes | 183rd | |
| Roman numberals | ||
| Base 2 | 1010101011001112 | 1010101111001112 |
| Base 3 | 10022222023 | 10100111113 |
| Base 4 | 111112134 | 111132134 |
| Base 5 | 11444235 | 12004315 |
| Base 6 | 2451156 | 2454516 |
| Base 7 | 1205127 | 1210547 |
| Base 8 | 525478 | 527478 |
| Base 9 | 328829 | 331449 |
| Base 10 | 2186310 | 2199110 |
| Base 11 | 1547611 | 1558211 |
| Base 12 | 1079b12 | 1088712 |
| Base 13 | 9c4a13 | a01813 |
| Base 14 | 7d7914 | 802b14 |
| Base 15 | 672815 | 67b115 |
| Base 16 | 556716 | 55e716 |