Positive Integers » 10001-20000 » 19901-20000 » 19991
Divisors of the Positive Integer 19991
1, 19991Sum of all the Divisors of 19991, including itself
19992Sum of the Proper Divisors of 19991
1Properties of the number 19991
The integer 19991 is an odd number.The integer 19991 is a Prime number.
1 is less than 19991, so 19991 is a deficient number.
The number 19991 as a Roman Numeral
_XM_XCMXCI (Roman Numerals with underscores in front have their values increased by 1,000. The underscore represents a line over the numeral, because the Romans used overlines to multiply by 1,000.)The number 19991 in various Numeral Systems
| Base | Representation |
|---|---|
| 2: | 100111000010111 |
| 3: | 1000102102 |
| 4: | 10320113 |
| 5: | 1114431 |
| 6: | 232315 |
| 7: | 112166 |
| 8: | 47027 |
| 9: | 30372 |
| 10: | 19991 |
| 11: | 14024 |
| 12: | B69B |
| 13: | 913A |
| 14: | 73DD |
| 15: | 5DCB |
| 16: | 4E17 |
| 17: | 412G |
| 18: | 37CB |
| 19: | 2H73 |
| 20: | 29JB |
| 21: | 236K |
| 22: | 1J6F |
| 23: | 1EI4 |
| 24: | 1AGN |
| 25: | 16OG |
| 26: | 13EN |
| 27: | 10BB |
| 28: | PDR |
| 29: | NMA |
| 30: | M6B |
| 31: | KOR |
| 32: | JGN |
| 33: | IBQ |
| 34: | H9X |
| 35: | GB6 |
| 36: | FFB |