21188638460

Names of 21188638460

• Cardinal: 21188638460 can be written as Twenty-one billion, one hundred eighty-eight million, six hundred thirty-eight thousand, four hundred sixty.

Scientific notation

• Scientific notation: 2.118863846 × 10¹⁰

Factors of 21188638460

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 3225

Divisors of 21188638460

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 10 11 20 22 41 44 55 82 110 164 205 220 410 451 820 902 1187 1804 1979 2255 2374 3958 4510 4748 5935 7916 9020 9895 11870 13057 19790 21769 23740 26114 39580 43538 48667 52228 65285 81139 87076 97334 108845 130570 162278 194668 217690 243335 261140 324556 405695 435380 486670 535337 811390 892529 973340 1070674 1622780 1785058 2141348 2349073 2676685 3570116 4462645 4698146 5353370 8925290 9396292 10706740 11745365 17850580 23490730 25839803 46981460 51679606 96311993 103359212 129199015 192623986 258398030 385247972 481559965 516796060 963119930 1059431923 1926239860 2118863846 4237727692 5297159615 10594319230 21188638460
• Sum of all divisors σ(n): 49792216320
• Sum of proper divisors (its aliquot sum) s(n): 28603577860
• 21188638460 is an abundant number, because the sum of its proper divisors (28603577860) is greater than itself. Its abundance is 7414939400

Bases of 21188638460

• Binary: 10011101110111100001111011011111100₂
• Hexadecimal: 0x4EEF0F6FC
• Base-36: 9QF622K

Squares and roots of 21188638460

• 21188638460 squared (21188638460²) is 448958399788591171600
• 21188638460 cubed (21188638460³) is 9512817216700598767780219736000
• The square root of 21188638460 is 145563.1768683275
• The cube root of 21188638460 is 2767.1605034829

Scales and comparisons

• 21,188,638,460 seconds is equal to 673 years, 38 weeks, 20 hours, 54 minutes, 20 seconds.
• To count from 1 to 21,188,638,460 would take you about one thousand, three hundred forty-seven 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 21188638460 cubic inches would be around 230.6 feet tall.

Recreational maths with 21188638460

• 21188638460 backwards is 06483688112
• The number of decimal digits it has is: 11
• The sum of 21188638460's digits is 47
• More coming soon!