Compare 19990 vs 19999
| Property | 19990 | 19999 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 21 × 51 × 19991 | 71 × 28571 |
| Prime factorization | 2 × 5 × 1999 | 7 × 2857 |
| Divisors count | 8 | 4 |
| Divisors | 1, 2, 5, 10, 1999, 3998, 9995, 19990 | 1, 7, 2857, 19999 |
| Number of properties | 0 | 1 |
| Semiprimes | 5081st | |
| Roman numberals | ||
| Base 2 | 1001110000101102 | 1001110000111112 |
| Base 3 | 10001021013 | 10001022013 |
| Base 4 | 103201124 | 103201334 |
| Base 5 | 11144305 | 11144445 |
| Base 6 | 2323146 | 2323316 |
| Base 7 | 1121657 | 1122107 |
| Base 8 | 470268 | 470378 |
| Base 9 | 303719 | 303819 |
| Base 10 | 1999010 | 1999910 |
| Base 11 | 1402311 | 1403111 |
| Base 12 | b69a12 | b6a712 |
| Base 13 | 913913 | 914513 |
| Base 14 | 73dc14 | 740714 |
| Base 15 | 5dca15 | 5dd415 |
| Base 16 | 4e1616 | 4e1f16 |