21721648128

Names of 21721648128

• Cardinal: 21721648128 can be written as Twenty-one billion, seven hundred twenty-one million, six hundred forty-eight thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1721648128 × 10¹⁰

Factors of 21721648128

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 7070854

Divisors of 21721648128

• Number of divisors d(n): 44
• Complete list of divisors:
  1 2 3 4 6 8 12 16 24 32 48 64 96 128 192 256 384 512 768 1024 1536 3072 7070849 14141698 21212547 28283396 42425094 56566792 84850188 113133584 169700376 226267168 339400752 452534336 678801504 905068672 1357603008 1810137344 2715206016 3620274688 5430412032 7240549376 10860824064 21721648128
• Sum of all divisors σ(n): 57896119800
• Sum of proper divisors (its aliquot sum) s(n): 36174471672
• 21721648128 is an abundant number, because the sum of its proper divisors (36174471672) is greater than itself. Its abundance is 14452823544

Bases of 21721648128

• Binary: 10100001110101101100000110000000000₂
• Hexadecimal: 0x50EB60C00
• Base-36: 9Z8IAYO

Squares and roots of 21721648128

• 21721648128 squared (21721648128²) is 471829997396645904384
• 21721648128 cubed (21721648128³) is 10248925179685098382441580593152
• The square root of 21721648128 is 147382.6588442481
• The cube root of 21721648128 is 2790.1716696569

Scales and comparisons

• 21,721,648,128 seconds is equal to 690 years, 35 weeks, 2 days, 23 hours, 8 minutes, 48 seconds.
• To count from 1 to 21,721,648,128 would take you about one thousand, three hundred eighty-one 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 21721648128 cubic inches would be around 232.5 feet tall.

Recreational maths with 21721648128

• 21721648128 backwards is 82184612712
• The number of decimal digits it has is: 11
• The sum of 21721648128's digits is 42
• More coming soon!