Compare 20981 vs 21149
| Property | 20981 | 21149 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 209811 | 211491 |
| Prime factorization | 20981 | 21149 |
| Divisors count | 2 | 2 |
| Divisors | 1, 20981 | 1, 21149 |
| Number of properties | 5 | 11 |
| Additive primes | 1104th | |
| Chen primes | 1161st | 1168th |
| Good primes | 265th | |
| Happy primes | 394th | |
| Isolated primes | 1658th | |
| Long primes | 904th | |
| Primes | 2359th | 2377th |
| Pythagorean primes | 1172nd | 1180th |
| Sexy primes (2nd member) | 719th | |
| Sophie germain primes | 344th | |
| Super primes | 352nd | |
| Twin primes (1st member) | 357th | |
| Ulam primes | 178th | |
| Roman numberals | ||
| Base 2 | 1010001111101012 | 1010010100111012 |
| Base 3 | 10012100023 | 10020000223 |
| Base 4 | 110133114 | 110221314 |
| Base 5 | 11324115 | 11340445 |
| Base 6 | 2410456 | 2415256 |
| Base 7 | 1151127 | 1154427 |
| Base 8 | 507658 | 512358 |
| Base 9 | 317029 | 320089 |
| Base 10 | 2098110 | 2114910 |
| Base 11 | 1484411 | 1498711 |
| Base 12 | 1018512 | 102a512 |
| Base 13 | 971c13 | 981b13 |
| Base 14 | 790914 | 79c914 |
| Base 15 | 633b15 | 63ee15 |
| Base 16 | 51f516 | 529d16 |