21231684738

Names of 21231684738

• Cardinal: 21231684738 can be written as Twenty-one billion, two hundred thirty-one million, six hundred eighty-four thousand, seven hundred thirty-eight.

Scientific notation

• Scientific notation: 2.1231684738 × 10¹⁰

Factors of 21231684738

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 26458

Divisors of 21231684738

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 9 11 18 22 27 33 54 66 99 198 297 594 1429 2858 4287 8574 12861 15719 25013 25722 31438 38583 47157 50026 75039 77166 94314 141471 150078 225117 275143 282942 424413 450234 550286 675351 825429 848826 1350702 1650858 2476287 4952574 7428861 14857722 35743577 71487154 107230731 214461462 321692193 393179347 643384386 786358694 965076579 1179538041 1930153158 2359076082 3538614123 7077228246 10615842369 21231684738
• Sum of all divisors σ(n): 51508828800
• Sum of proper divisors (its aliquot sum) s(n): 30277144062
• 21231684738 is an abundant number, because the sum of its proper divisors (30277144062) is greater than itself. Its abundance is 9045459324

Bases of 21231684738

• Binary: 10011110001100000011100110010000010₂
• Hexadecimal: 0x4F181CC82
• Base-36: 9R4SOSI

Squares and roots of 21231684738

• 21231684738 squared (21231684738²) is 450784436813822128644
• 21231684738 cubed (21231684738³) is 9570913047227952636177487435272
• The square root of 21231684738 is 145710.9629986707
• The cube root of 21231684738 is 2769.0331326463

Scales and comparisons

• 21,231,684,738 seconds is equal to 675 years, 5 weeks, 2 days, 2 hours, 12 minutes, 18 seconds.
• To count from 1 to 21,231,684,738 would take you about one thousand, three hundred fifty 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 21231684738 cubic inches would be around 230.8 feet tall.

Recreational maths with 21231684738

• 21231684738 backwards is 83748613212
• The number of decimal digits it has is: 11
• The sum of 21231684738's digits is 45
• More coming soon!