21398984775

Names of 21398984775

• Cardinal: 21398984775 can be written as Twenty-one billion, three hundred ninety-eight million, nine hundred eighty-four thousand, seven hundred seventy-five.

Scientific notation

• Scientific notation: 2.1398984775 × 10¹⁰

Factors of 21398984775

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 405

Divisors of 21398984775

• Number of divisors d(n): 162
• Complete list of divisors:
  1 3 5 7 9 15 21 25 35 45 49 63 75 79 105 147 175 225 237 245 311 315 395 441 525 553 711 735 933 1185 1225 1555 1575 1659 1975 2177 2205 2765 2799 3555 3675 3871 4665 4977 5925 6241 6531 7775 8295 10885 11025 11613 13825 13995 15239 17775 18723 19355 19593 23325 24569 24885 31205 32655 34839 41475 43687 45717 54425 56169 58065 69975 73707 76195 93615 96775 97965 122845 124425 131061 137151 156025 163275 171983 174195 218435 221121 228585 280845 290325 305809 368535 380975 393183 468075 489825 515949 614225 655305 685755 859915 870975 917427 1092175 1105605 1142925 1203881 1404225 1529045 1547847 1842675 1940951 1965915 2579745 2752281 3276525 3428775 3611643 4299575 4587135 5528025 5822853 6019405 7645225 7739235 9704755 9829575 10834929 12898725 13586657 13761405 17468559 18058215 22935675 29114265 30097025 38696175 40759971 48523775 54174645 67933285 68807025 87342795 90291075 95106599 122279913 145571325 203799855 270873225 285319797 339666425 436713975 475532995 611399565 855959391 1018999275 1426598985 2377664975 3056997825 4279796955 7132994925 21398984775
• Sum of all divisors σ(n): 45302303592
• Sum of proper divisors (its aliquot sum) s(n): 23903318817
• 21398984775 is an abundant number, because the sum of its proper divisors (23903318817) is greater than itself. Its abundance is 2504334042

Bases of 21398984775

• Binary: 10011111011011110101001100001000111₂
• Hexadecimal: 0x4FB7A9847
• Base-36: 9TWEIBR

Squares and roots of 21398984775

• 21398984775 squared (21398984775²) is 457916549400681800625
• 21398984775 cubed (21398984775³) is 9798949268845725226193960484375
• The square root of 21398984775 is 146283.9183745091
• The cube root of 21398984775 is 2776.2871944129

Scales and comparisons

• 21,398,984,775 seconds is equal to 680 years, 21 weeks, 6 days, 10 hours, 26 minutes, 15 seconds.
• To count from 1 to 21,398,984,775 would take you about one thousand, three hundred sixty years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21398984775 cubic inches would be around 231.4 feet tall.

Recreational maths with 21398984775

• 21398984775 backwards is 57748989312
• 21398984775 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21398984775's digits is 63
• More coming soon!