21421291808

Names of 21421291808

• Cardinal: 21421291808 can be written as Twenty-one billion, four hundred twenty-one million, two hundred ninety-one thousand, eight hundred eight.

Scientific notation

• Scientific notation: 2.1421291808 × 10¹⁰

Factors of 21421291808

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 6482

Divisors of 21421291808

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 7 8 14 16 28 32 56 89 112 173 178 224 346 356 623 692 712 1211 1246 1384 1424 2422 2492 2768 2848 4844 4984 5536 6211 9688 9968 12422 15397 19376 19936 24844 30794 38752 43477 49688 61588 86954 99376 107779 123176 173908 198752 215558 246352 347816 431116 492704 552779 695632 862232 1074503 1105558 1391264 1724464 2149006 2211116 3448928 3869453 4298012 4422232 7521521 7738906 8596024 8844464 15043042 15477812 17192048 17688928 30086084 30955624 34384096 60172168 61911248 95630767 120344336 123822496 191261534 240688672 382523068 669415369 765046136 1338830738 1530092272 2677661476 3060184544 5355322952 10710645904 21421291808
• Sum of all divisors σ(n): 49029079680
• Sum of proper divisors (its aliquot sum) s(n): 27607787872
• 21421291808 is an abundant number, because the sum of its proper divisors (27607787872) is greater than itself. Its abundance is 6186496064

Bases of 21421291808

• Binary: 10011111100110011101111100100100000₂
• Hexadecimal: 0x4FCCEF920
• Base-36: 9U9OMJK

Squares and roots of 21421291808

• 21421291808 squared (21421291808²) is 458871742723487908864
• 21421291808 cubed (21421291808³) is 9829625503325335151335453786112
• The square root of 21421291808 is 146360.1441923313
• The cube root of 21421291808 is 2777.2515582773

Scales and comparisons

• 21,421,291,808 seconds is equal to 681 years, 6 weeks, 5 days, 14 hours, 50 minutes, 8 seconds.
• To count from 1 to 21,421,291,808 would take you about one thousand, three hundred sixty-two 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 21421291808 cubic inches would be around 231.4 feet tall.

Recreational maths with 21421291808

• 21421291808 backwards is 80819212412
• The number of decimal digits it has is: 11
• The sum of 21421291808's digits is 38
• More coming soon!