Compare 19980 vs 19991
| Property | 19980 | 19991 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 4 | 1 |
| Total factors | 7 | 1 |
| Prime factorization | 22 × 33 × 51 × 371 | 199911 |
| Prime factorization | 2 × 2 × 3 × 3 × 3 × 5 × 37 | 19991 |
| Divisors count | 48 | 2 |
| Divisors | 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 37, 45, 54, 60, 74, 90, 108, 111, 135, 148, 180, 185, 222, 270, 333, 370, 444, 540, 555, 666, 740, 999, 1110, 1332, 1665, 1998, 2220, 3330, 3996, 4995, 6660, 9990, 19980 | 1, 19991 |
| Number of properties | 0 | 9 |
| Additive primes | 1049th | |
| Chen primes | 1111th | |
| Harmonic primes | 820th | |
| Palindromic primes | 46th | |
| Primes | 2260th | |
| Prime triplets (1st member) | 168th | |
| Sexy primes (1st member) | 693rd | |
| Sophie germain primes | 326th | |
| Twin primes (1st member) | 342nd | |
| Roman numberals | ||
| Base 2 | 1001110000011002 | 1001110000101112 |
| Base 3 | 10001020003 | 10001021023 |
| Base 4 | 103200304 | 103201134 |
| Base 5 | 11144105 | 11144315 |
| Base 6 | 2323006 | 2323156 |
| Base 7 | 1121527 | 1121667 |
| Base 8 | 470148 | 470278 |
| Base 9 | 303609 | 303729 |
| Base 10 | 1998010 | 1999110 |
| Base 11 | 1401411 | 1402411 |
| Base 12 | b69012 | b69b12 |
| Base 13 | 912c13 | 913a13 |
| Base 14 | 73d214 | 73dd14 |
| Base 15 | 5dc015 | 5dcb15 |
| Base 16 | 4e0c16 | 4e1716 |