Compare 201810 vs 201821
| Property | 201810 | 201821 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 5 | 1 |
| Total factors | 6 | 1 |
| Prime factorization | 21 × 31 × 51 × 71 × 312 | 2018211 |
| Prime factorization | 2 × 3 × 5 × 7 × 31 × 31 | 201821 |
| Divisors count | 48 | 2 |
| Divisors | 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 31, 35, 42, 62, 70, 93, 105, 155, 186, 210, 217, 310, 434, 465, 651, 930, 961, 1085, 1302, 1922, 2170, 2883, 3255, 4805, 5766, 6510, 6727, 9610, 13454, 14415, 20181, 28830, 33635, 40362, 67270, 100905, 201810 | 1, 201821 |
| Number of properties | 0 | 10 |
| Chen primes | 7581st | |
| Long primes | 6796th | |
| Primes | 18129th | |
| Prime quadruplets (1st member) | 54th | |
| Prime quintuplet 2s (1st member) | 15th | |
| Prime triplets (1st member) | 844th | |
| Pythagorean primes | 9050th | |
| Sexy primes (1st member) | 4326th | |
| Sexy prime triplets (1st member) | 870th | |
| Twin primes (1st member) | 2172nd | |
| Roman numberals | ||
| Base 2 | 1100010100010100102 | 1100010100010111012 |
| Base 3 | 1010202111103 | 1010202112123 |
| Base 4 | 3011011024 | 3011011314 |
| Base 5 | 224242205 | 224242415 |
| Base 6 | 41541506 | 41542056 |
| Base 7 | 15002407 | 15002547 |
| Base 8 | 6121228 | 6121358 |
| Base 9 | 3367439 | 3367559 |
| Base 10 | 20181010 | 20182110 |
| Base 11 | 12869411 | 1286a411 |
| Base 12 | 9895612 | 9896512 |
| Base 13 | 70b1b13 | 70b2913 |
| Base 14 | 5379014 | 5379b14 |
| Base 15 | 3ebe015 | 3ebeb15 |
| Base 16 | 3145216 | 3145d16 |