21020347136

Names of 21020347136

• Cardinal: 21020347136 can be written as Twenty-one billion, twenty million, three hundred forty-seven thousand, one hundred thirty-six.

Scientific notation

• Scientific notation: 2.1020347136 × 10¹⁰

Factors of 21020347136

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 4830062

Divisors of 21020347136

• Number of divisors d(n): 36
• Complete list of divisors:
  1 2 4 8 16 17 32 34 64 68 128 136 256 272 544 1088 2176 4352 4830043 9660086 19320172 38640344 77280688 82110731 154561376 164221462 309122752 328442924 618245504 656885848 1236491008 1313771696 2627543392 5255086784 10510173568 21020347136
• Sum of all divisors σ(n): 44426744712
• Sum of proper divisors (its aliquot sum) s(n): 23406397576
• 21020347136 is an abundant number, because the sum of its proper divisors (23406397576) is greater than itself. Its abundance is 2386050440

Bases of 21020347136

• Binary: 10011100100111010010000101100000000₂
• Hexadecimal: 0x4E4E90B00
• Base-36: 9NMYZNK

Squares and roots of 21020347136

• 21020347136 squared (21020347136²) is 441854993717943402496
• 21020347136 cubed (21020347136³) is 9287945351726269592466888851456
• The square root of 21020347136 is 144983.9547536209
• The cube root of 21020347136 is 2759.8149396329

Scales and comparisons

• 21,020,347,136 seconds is equal to 668 years, 19 weeks, 6 days, 1 hour, 18 minutes, 56 seconds.
• To count from 1 to 21,020,347,136 would take you about one thousand, three hundred thirty-six 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 21020347136 cubic inches would be around 230 feet tall.

Recreational maths with 21020347136

• 21020347136 backwards is 63174302012
• The number of decimal digits it has is: 11
• The sum of 21020347136's digits is 29
• More coming soon!