21090979408

Names of 21090979408

• Cardinal: 21090979408 can be written as Twenty-one billion, ninety million, nine hundred seventy-nine thousand, four hundred eight.

Scientific notation

• Scientific notation: 2.1090979408 × 10¹⁰

Factors of 21090979408

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 229

Divisors of 21090979408

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 8 16 29 58 71 116 127 142 232 254 284 464 508 568 1016 1136 2032 2059 3683 4118 5041 7366 8236 9017 10082 14732 16472 18034 20164 29464 32944 36068 40328 58928 72136 80656 144272 146189 261493 292378 357911 522986 584756 640207 715822 1045972 1169512 1280414 1431644 2091944 2339024 2560828 2863288 4183888 5121656 5726576 10243312 10379419 18566003 20758838 37132006 41517676 45454697 74264012 83035352 90909394 148528024 166070704 181818788 297056048 363637576 727275152 1318186213 2636372426 5272744852 10545489704 21090979408
• Sum of all divisors σ(n): 43214376960
• Sum of proper divisors (its aliquot sum) s(n): 22123397552
• 21090979408 is an abundant number, because the sum of its proper divisors (22123397552) is greater than itself. Its abundance is 1032418144

Bases of 21090979408

• Binary: 10011101001000111101100111001010000₂
• Hexadecimal: 0x4E91ECE50
• Base-36: 9OT0VV4

Squares and roots of 21090979408

• 21090979408 squared (21090979408²) is 444829412388680030464
• 21090979408 cubed (21090979408³) is 9381887976762390614817036685312
• The square root of 21090979408 is 145227.3369858443
• The cube root of 21090979408 is 2762.9026474457

Scales and comparisons

• 21,090,979,408 seconds is equal to 670 years, 32 weeks, 4 days, 13 hours, 23 minutes, 28 seconds.
• To count from 1 to 21,090,979,408 would take you about one thousand, three hundred forty-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 21090979408 cubic inches would be around 230.2 feet tall.

Recreational maths with 21090979408

• 21090979408 backwards is 80497909012
• The number of decimal digits it has is: 11
• The sum of 21090979408's digits is 49
• More coming soon!