21000684165678

Names of 21000684165678

• Cardinal: 21000684165678 can be written as Twenty-one trillion, six hundred eighty-four million, one hundred sixty-five thousand, six hundred seventy-eight.

Scientific notation

• Scientific notation: 2.1000684165678 × 10¹³

Factors of 21000684165678

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 23114406

Divisors of 21000684165678

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 6 7 9 14 18 21 42 63 126 7213 14426 21639 43278 50491 64917 100982 129834 151473 302946 454419 908838 23107181 46214362 69321543 138643086 161750267 207964629 323500534 415929258 485250801 970501602 1455752403 2911504806 166672096553 333344193106 500016289659 1000032579318 1166704675871 1500048868977 2333409351742 3000097737954 3500114027613 7000228055226 10500342082839 21000684165678
• Sum of all divisors σ(n): 52008905815776
• Sum of proper divisors (its aliquot sum) s(n): 31008221650098
• 21000684165678 is an abundant number, because the sum of its proper divisors (31008221650098) is greater than itself. Its abundance is 10007537484420

Bases of 21000684165678

• Binary: 100110001100110011010010100011101101000101110₂
• Hexadecimal: 0x13199A51DA2E
• Base-36: 7FZKX4PBI

Squares and roots of 21000684165678

• 21000684165678 squared (21000684165678²) is 441028735426558674953199684
• 21000684165678 cubed (21000684165678³) is 9261905180681522768152249501480073245752
• The square root of 21000684165678 is 4582650.3429432625
• The cube root of 21000684165678 is 27589.5413734511

Scales and comparisons

• 21,000,684,165,678 seconds is equal to 667,756 years, 41 weeks, 3 days, 3 hours, 21 minutes, 18 seconds.
• To count from 1 to 21,000,684,165,678 would take you about one million, six hundred sixty-nine thousand, three hundred ninety-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 21000684165678 cubic inches would be around 2299.1 feet tall.

Recreational maths with 21000684165678

• 21000684165678 backwards is 87656148600012
• The number of decimal digits it has is: 14
• The sum of 21000684165678's digits is 54
• More coming soon!