Compare 19801 vs 19991
| Property | 19801 | 19991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 198011 | 199911 |
| Prime factorization | 19801 | 19991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 19801 | 1, 19991 |
| Number of properties | 6 | 9 |
| Additive primes | 1042nd | 1049th |
| Centered square primes | 35th | |
| Chen primes | 1111th | |
| Emirps | 623rd | |
| Harmonic primes | 820th | |
| Isolated primes | 1566th | |
| Palindromic primes | 46th | |
| Primes | 2241st | 2260th |
| Prime triplets (1st member) | 168th | |
| Pythagorean primes | 1113th | |
| Sexy primes (1st member) | 693rd | |
| Sophie germain primes | 326th | |
| Twin primes (1st member) | 342nd | |
| Roman numberals | ||
| Base 2 | 1001101010110012 | 1001110000101112 |
| Base 3 | 10000111013 | 10001021023 |
| Base 4 | 103111214 | 103201134 |
| Base 5 | 11132015 | 11144315 |
| Base 6 | 2314016 | 2323156 |
| Base 7 | 1115057 | 1121667 |
| Base 8 | 465318 | 470278 |
| Base 9 | 301419 | 303729 |
| Base 10 | 1980110 | 1999110 |
| Base 11 | 1397111 | 1402411 |
| Base 12 | b56112 | b69b12 |
| Base 13 | 902213 | 913a13 |
| Base 14 | 730514 | 73dd14 |
| Base 15 | 5d0115 | 5dcb15 |
| Base 16 | 4d5916 | 4e1716 |