Compare 20981 vs 21001
| Property | 20981 | 21001 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 209811 | 210011 |
| Prime factorization | 20981 | 21001 |
| Divisors count | 2 | 2 |
| Divisors | 1, 20981 | 1, 21001 |
| Number of properties | 5 | 5 |
| Chen primes | 1161st | 1162nd |
| Good primes | 265th | |
| Harmonic primes | 867th | |
| Isolated primes | 1648th | |
| Primes | 2359th | 2361st |
| Pythagorean primes | 1172nd | 1173rd |
| Twin primes (1st member) | 357th | |
| Roman numberals | ||
| Base 2 | 1010001111101012 | 1010010000010012 |
| Base 3 | 10012100023 | 10012102113 |
| Base 4 | 110133114 | 110200214 |
| Base 5 | 11324115 | 11330015 |
| Base 6 | 2410456 | 2411216 |
| Base 7 | 1151127 | 1151417 |
| Base 8 | 507658 | 510118 |
| Base 9 | 317029 | 317249 |
| Base 10 | 2098110 | 2100110 |
| Base 11 | 1484411 | 1486211 |
| Base 12 | 1018512 | 101a112 |
| Base 13 | 971c13 | 973613 |
| Base 14 | 790914 | 792114 |
| Base 15 | 633b15 | 635115 |
| Base 16 | 51f516 | 520916 |