21000121308

Names of 21000121308

• Cardinal: 21000121308 can be written as Twenty-one billion, one hundred twenty-one thousand, three hundred eight.

Scientific notation

• Scientific notation: 2.1000121308 × 10¹⁰

Factors of 21000121308

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 81030

Divisors of 21000121308

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 9 12 18 31 36 62 93 124 186 233 279 372 466 558 699 932 1116 1398 2097 2796 4194 7223 8388 14446 21669 28892 43338 65007 80761 86676 130014 161522 242283 260028 323044 484566 726849 969132 1453698 2503591 2907396 5007182 7510773 10014364 15021546 18817313 22532319 30043092 37634626 45064638 56451939 75269252 90129276 112903878 169355817 225807756 338711634 583336703 677423268 1166673406 1750010109 2333346812 3500020218 5250030327 7000040436 10500060654 21000121308
• Sum of all divisors σ(n): 55031872896
• Sum of proper divisors (its aliquot sum) s(n): 34031751588
• 21000121308 is an abundant number, because the sum of its proper divisors (34031751588) is greater than itself. Its abundance is 13031630280

Bases of 21000121308

• Binary: 10011100011101101000110101111011100₂
• Hexadecimal: 0x4E3B46BDC
• Base-36: 9NAXHB0

Squares and roots of 21000121308

• 21000121308 squared (21000121308²) is 441005094950715630864
• 21000121308 cubed (21000121308³) is 9261160491411086529555748850112
• The square root of 21000121308 is 144914.1860136543
• The cube root of 21000121308 is 2758.9294887451

Scales and comparisons

• 21,000,121,308 seconds is equal to 667 years, 38 weeks, 2 days, 23 hours, 1 minute, 48 seconds.
• To count from 1 to 21,000,121,308 would take you about one thousand, three hundred thirty-five 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 21000121308 cubic inches would be around 229.9 feet tall.

Recreational maths with 21000121308

• 21000121308 backwards is 80312100012
• 21000121308 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21000121308's digits is 18
• More coming soon!