21084151218

Names of 21084151218

• Cardinal: 21084151218 can be written as Twenty-one billion, eighty-four million, one hundred fifty-one thousand, two hundred eighteen.

Scientific notation

• Scientific notation: 2.1084151218 × 10¹⁰

Factors of 21084151218

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 3131

Divisors of 21084151218

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 13 26 39 78 137 274 411 822 997 1781 1979 1994 2991 3562 3958 5343 5937 5982 10686 11874 12961 25727 25922 38883 51454 77181 77766 136589 154362 271123 273178 409767 542246 813369 819534 1626738 1775657 1973063 3524599 3551314 3946126 5326971 5919189 7049198 10573797 10653942 11838378 21147594 25649819 51299638 76949457 153898914 270309631 540619262 810928893 1621857786 3514025203 7028050406 10542075609 21084151218
• Sum of all divisors σ(n): 45812511360
• Sum of proper divisors (its aliquot sum) s(n): 24728360142
• 21084151218 is an abundant number, because the sum of its proper divisors (24728360142) is greater than itself. Its abundance is 3644208924

Bases of 21084151218

• Binary: 10011101000101101101001110110110010₂
• Hexadecimal: 0x4E8B69DB2
• Base-36: 9OOYJ76

Squares and roots of 21084151218

• 21084151218 squared (21084151218²) is 444541432583490883524
• 21084151218 cubed (21084151218³) is 9372778787256674198544440732232
• The square root of 21084151218 is 145203.8264578453
• The cube root of 21084151218 is 2762.6044526559

Scales and comparisons

• 21,084,151,218 seconds is equal to 670 years, 21 weeks, 2 days, 12 hours, 40 minutes, 18 seconds.
• To count from 1 to 21,084,151,218 would take you about one thousand, three hundred forty 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 21084151218 cubic inches would be around 230.2 feet tall.

Recreational maths with 21084151218

• 21084151218 backwards is 81215148012
• The number of decimal digits it has is: 11
• The sum of 21084151218's digits is 33
• More coming soon!