Compare 19991 vs 20639
| Property | 19991 | 20639 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 199911 | 206391 |
| Prime factorization | 19991 | 20639 |
| Divisors count | 2 | 2 |
| Divisors | 1, 19991 | 1, 20639 |
| Number of properties | 9 | 4 |
| Additive primes | 1049th | |
| Chen primes | 1111th | 1143rd |
| Happy primes | 384th | |
| Harmonic primes | 820th | |
| Palindromic primes | 46th | |
| Primes | 2260th | 2326th |
| Prime triplets (1st member) | 168th | |
| Sexy primes (1st member) | 693rd | |
| Sophie germain primes | 326th | |
| Twin primes (1st member) | 342nd | 351st |
| Roman numberals | ||
| Base 2 | 1001110000101112 | 1010000100111112 |
| Base 3 | 10001021023 | 10010221023 |
| Base 4 | 103201134 | 110021334 |
| Base 5 | 11144315 | 11300245 |
| Base 6 | 2323156 | 2353156 |
| Base 7 | 1121667 | 1141137 |
| Base 8 | 470278 | 502378 |
| Base 9 | 303729 | 312729 |
| Base 10 | 1999110 | 2063910 |
| Base 11 | 1402411 | 1456311 |
| Base 12 | b69b12 | bb3b12 |
| Base 13 | 913a13 | 951813 |
| Base 14 | 73dd14 | 774314 |
| Base 15 | 5dcb15 | 61ae15 |
| Base 16 | 4e1716 | 509f16 |