Compare 18517 vs 19991
| Property | 18517 | 19991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 185171 | 199911 |
| Prime factorization | 18517 | 19991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 18517 | 1, 19991 |
| Number of properties | 8 | 9 |
| Additive primes | 1049th | |
| Chen primes | 1048th | 1111th |
| Cousin primes (1st member) | 332nd | |
| Harmonic primes | 765th | 820th |
| Isolated primes | 1475th | |
| Palindromic primes | 46th | |
| Primes | 2120th | 2260th |
| Prime triplets (1st member) | 160th | 168th |
| Pythagorean primes | 1050th | |
| Sexy primes (1st member) | 652nd | 693rd |
| Sophie germain primes | 326th | |
| Twin primes (1st member) | 342nd | |
| Roman numberals | ||
| Base 2 | 1001000010101012 | 1001110000101112 |
| Base 3 | 2211012113 | 10001021023 |
| Base 4 | 102011114 | 103201134 |
| Base 5 | 10430325 | 11144315 |
| Base 6 | 2214216 | 2323156 |
| Base 7 | 1046627 | 1121667 |
| Base 8 | 441258 | 470278 |
| Base 9 | 273549 | 303729 |
| Base 10 | 1851710 | 1999110 |
| Base 11 | 12a0411 | 1402411 |
| Base 12 | a87112 | b69b12 |
| Base 13 | 857513 | 913a13 |
| Base 14 | 6a6914 | 73dd14 |
| Base 15 | 574715 | 5dcb15 |
| Base 16 | 485516 | 4e1716 |