Compare 19991 vs 20021
| Property | 19991 | 20021 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 199911 | 200211 |
| Prime factorization | 19991 | 20021 |
| Divisors count | 2 | 2 |
| Divisors | 1, 19991 | 1, 20021 |
| Number of properties | 9 | 6 |
| Additive primes | 1049th | 1051st |
| Chen primes | 1111th | 1113th |
| Harmonic primes | 820th | 822nd |
| Palindromic primes | 46th | |
| Primes | 2260th | 2264th |
| Prime triplets (1st member) | 168th | |
| Pythagorean primes | 1126th | |
| Sexy primes (1st member) | 693rd | |
| Sophie germain primes | 326th | |
| Twin primes (1st member) | 342nd | 343rd |
| Roman numberals | ||
| Base 2 | 1001110000101112 | 1001110001101012 |
| Base 3 | 10001021023 | 10001101123 |
| Base 4 | 103201134 | 103203114 |
| Base 5 | 11144315 | 11200415 |
| Base 6 | 2323156 | 2324056 |
| Base 7 | 1121667 | 1122417 |
| Base 8 | 470278 | 470658 |
| Base 9 | 303729 | 304159 |
| Base 10 | 1999110 | 2002110 |
| Base 11 | 1402411 | 1405111 |
| Base 12 | b69b12 | b70512 |
| Base 13 | 913a13 | 916113 |
| Base 14 | 73dd14 | 742114 |
| Base 15 | 5dcb15 | 5deb15 |
| Base 16 | 4e1716 | 4e3516 |