Compare 21839 vs 21991
| Property | 21839 | 21991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 218391 | 219911 |
| Prime factorization | 21839 | 21991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21839 | 1, 21991 |
| Number of properties | 5 | 5 |
| Additive primes | 1133rd | |
| Chen primes | 1202nd | 1208th |
| Harmonic primes | 902nd | |
| Isolated primes | 1720th | |
| Primes | 2449th | 2463rd |
| Sexy primes (1st member) | 742nd | |
| Sexy prime triplets (1st member) | 202nd | |
| Twin primes (1st member) | 372nd | |
| Roman numberals | ||
| Base 2 | 1010101010011112 | 1010101111001112 |
| Base 3 | 10022212123 | 10100111113 |
| Base 4 | 111110334 | 111132134 |
| Base 5 | 11443245 | 12004315 |
| Base 6 | 2450356 | 2454516 |
| Base 7 | 1204467 | 1210547 |
| Base 8 | 525178 | 527478 |
| Base 9 | 328559 | 331449 |
| Base 10 | 2183910 | 2199110 |
| Base 11 | 1545411 | 1558211 |
| Base 12 | 1077b12 | 1088712 |
| Base 13 | 9c2c13 | a01813 |
| Base 14 | 7d5d14 | 802b14 |
| Base 15 | 670e15 | 67b115 |
| Base 16 | 554f16 | 55e716 |