Compare 21006 vs 21013
| Property | 21006 | 21013 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 5 | 1 |
| Prime factorization | 21 × 33 × 3891 | 210131 |
| Prime factorization | 2 × 3 × 3 × 3 × 389 | 21013 |
| Divisors count | 16 | 2 |
| Divisors | 1, 2, 3, 6, 9, 18, 27, 54, 389, 778, 1167, 2334, 3501, 7002, 10503, 21006 | 1, 21013 |
| Number of properties | 0 | 13 |
| Additive primes | 1095th | |
| Centered square primes | 37th | |
| Cousin primes (1st member) | 358th | |
| Harmonic primes | 868th | |
| Lucky primes | 384th | |
| Primes | 2363rd | |
| Prime quadruplets (2nd member) | 20th | |
| Prime quintuplet 2s (2nd member) | 7th | |
| Prime triplets (1st member) | 176th | |
| Prime triplets (2nd member) | 175th | |
| Pythagorean primes | 1174th | |
| Sexy primes (1st member) | 715th | |
| Twin primes (2nd member) | 358th | |
| Roman numberals | ||
| Base 2 | 1010010000011102 | 1010010000101012 |
| Base 3 | 10012110003 | 10012110213 |
| Base 4 | 110200324 | 110201114 |
| Base 5 | 11330115 | 11330235 |
| Base 6 | 2411306 | 2411416 |
| Base 7 | 1151467 | 1151567 |
| Base 8 | 510168 | 510258 |
| Base 9 | 317309 | 317379 |
| Base 10 | 2100610 | 2101310 |
| Base 11 | 1486711 | 1487311 |
| Base 12 | 101a612 | 101b112 |
| Base 13 | 973b13 | 974513 |
| Base 14 | 792614 | 792d14 |
| Base 15 | 635615 | 635d15 |
| Base 16 | 520e16 | 521516 |