21528769788

Names of 21528769788

• Cardinal: 21528769788 can be written as Twenty-one billion, five hundred twenty-eight million, seven hundred sixty-nine thousand, seven hundred eighty-eight.

Scientific notation

• Scientific notation: 2.1528769788 × 10¹⁰

Factors of 21528769788

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 39940

Divisors of 21528769788

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 9 12 18 27 29 36 54 58 87 108 116 173 174 261 346 348 519 522 692 783 1038 1044 1557 1566 2076 3114 3132 4671 5017 6228 9342 10034 15051 18684 20068 30102 39733 45153 60204 79466 90306 119199 135459 158932 180612 238398 270918 357597 476796 541836 715194 1072791 1152257 1430388 2145582 2304514 3456771 4291164 4609028 6873809 6913542 10370313 13747618 13827084 20621427 20740626 27495236 31110939 41242854 41481252 61864281 62221878 82485708 123728562 124443756 185592843 199340461 247457124 371185686 398680922 598021383 742371372 797361844 1196042766 1794064149 2392085532 3588128298 5382192447 7176256596 10764384894 21528769788
• Sum of all divisors σ(n): 58075214400
• Sum of proper divisors (its aliquot sum) s(n): 36546444612
• 21528769788 is an abundant number, because the sum of its proper divisors (36546444612) is greater than itself. Its abundance is 15017674824

Bases of 21528769788

• Binary: 10100000011001101101111010011111100₂
• Hexadecimal: 0x50336F4FC
• Base-36: 9W1O930

Squares and roots of 21528769788

• 21528769788 squared (21528769788²) is 463487928584701564944
• 21528769788 cubed (21528769788³) is 9978324914017024650362707111872
• The square root of 21528769788 is 146726.8543518873
• The cube root of 21528769788 is 2781.8886200437

Scales and comparisons

• 21,528,769,788 seconds is equal to 684 years, 28 weeks, 3 days, 13 hours, 49 minutes, 48 seconds.
• To count from 1 to 21,528,769,788 would take you about one thousand, three hundred sixty-nine 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 21528769788 cubic inches would be around 231.8 feet tall.

Recreational maths with 21528769788

• 21528769788 backwards is 88796782512
• The number of decimal digits it has is: 11
• The sum of 21528769788's digits is 63
• More coming soon!