Compare 19181 vs 19991
| Property | 19181 | 19991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 191811 | 199911 |
| Prime factorization | 19181 | 19991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 19181 | 1, 19991 |
| Number of properties | 7 | 9 |
| Additive primes | 1049th | |
| Chen primes | 1080th | 1111th |
| Emirps | 597th | |
| Harmonic primes | 787th | 820th |
| Long primes | 830th | |
| Palindromic primes | 46th | |
| Primes | 2175th | 2260th |
| Prime triplets (1st member) | 168th | |
| Pythagorean primes | 1079th | |
| Sexy primes (1st member) | 693rd | |
| Sophie germain primes | 326th | |
| Twin primes (1st member) | 330th | 342nd |
| Roman numberals | ||
| Base 2 | 1001010111011012 | 1001110000101112 |
| Base 3 | 2220221023 | 10001021023 |
| Base 4 | 102232314 | 103201134 |
| Base 5 | 11032115 | 11144315 |
| Base 6 | 2244456 | 2323156 |
| Base 7 | 1066317 | 1121667 |
| Base 8 | 453558 | 470278 |
| Base 9 | 282729 | 303729 |
| Base 10 | 1918110 | 1999110 |
| Base 11 | 1345811 | 1402411 |
| Base 12 | b12512 | b69b12 |
| Base 13 | 896613 | 913a13 |
| Base 14 | 6dc114 | 73dd14 |
| Base 15 | 5a3b15 | 5dcb15 |
| Base 16 | 4aed16 | 4e1716 |