Compare 19681 vs 19991
| Property | 19681 | 19991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 196811 | 199911 |
| Prime factorization | 19681 | 19991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 19681 | 1, 19991 |
| Number of properties | 7 | 9 |
| Additive primes | 1049th | |
| Chen primes | 1111th | |
| Emirps | 616th | |
| Harmonic primes | 805th | 820th |
| Isolated primes | 1556th | |
| Palindromic primes | 46th | |
| Primes | 2227th | 2260th |
| Prime triplets (1st member) | 168th | |
| Pythagorean primes | 1106th | |
| Sexy primes (1st member) | 687th | 693rd |
| Sophie germain primes | 326th | |
| Twin primes (1st member) | 342nd | |
| Ulam primes | 163rd | |
| Roman numberals | ||
| Base 2 | 1001100111000012 | 1001110000101112 |
| Base 3 | 2222222213 | 10001021023 |
| Base 4 | 103032014 | 103201134 |
| Base 5 | 11122115 | 11144315 |
| Base 6 | 2310416 | 2323156 |
| Base 7 | 1112447 | 1121667 |
| Base 8 | 463418 | 470278 |
| Base 9 | 288879 | 303729 |
| Base 10 | 1968110 | 1999110 |
| Base 11 | 1387211 | 1402411 |
| Base 12 | b48112 | b69b12 |
| Base 13 | 8c5c13 | 913a13 |
| Base 14 | 725b14 | 73dd14 |
| Base 15 | 5c7115 | 5dcb15 |
| Base 16 | 4ce116 | 4e1716 |