21001868507844

Names of 21001868507844

• Cardinal: 21001868507844 can be written as Twenty-one trillion, one billion, eight hundred sixty-eight million, five hundred seven thousand, eight hundred forty-four.

Scientific notation

• Scientific notation: 2.1001868507844 × 10¹³

Factors of 21001868507844

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 445798

Divisors of 21001868507844

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 7 9 12 14 18 21 27 28 36 42 54 63 84 108 126 189 252 378 756 74903 149806 224709 299612 370883 449418 524321 674127 741766 898836 1048642 1112649 1348254 1483532 1572963 2022381 2097284 2225298 2596181 2696508 3145926 3337947 4044762 4450596 4718889 5192362 6291852 6675894 7788543 8089524 9437778 10013841 10384724 13351788 14156667 15577086 18875556 20027682 23365629 28313334 31154172 40055364 46731258 56626668 70096887 93462516 140193774 280387548 27780249349 55560498698 83340748047 111120997396 166681496094 194461745443 250022244141 333362992188 388923490886 500044488282 583385236329 750066732423 777846981772 1000088976564 1166770472658 1500133464846 1750155708987 2333540945316 3000266929692 3500311417974 5250467126961 7000622835948 10500934253922 21001868507844
• Sum of all divisors σ(n): 62228757104640
• Sum of proper divisors (its aliquot sum) s(n): 41226888596796
• 21001868507844 is an abundant number, because the sum of its proper divisors (41226888596796) is greater than itself. Its abundance is 20225020088952

Bases of 21001868507844

• Binary: 100110001100111100000111010010111101011000100₂
• Hexadecimal: 0x1319E0E97AC4
• Base-36: 7G04I99L0

Squares and roots of 21001868507844

• 21001868507844 squared (21001868507844²) is 441078480820769563089528336
• 21001868507844 cubed (21001868507844³) is 9263472255837394036366844292570076267584
• The square root of 21001868507844 is 4582779.5613409119
• The cube root of 21001868507844 is 27590.0600048555

Scales and comparisons

• 21,001,868,507,844 seconds is equal to 667,794 years, 23 weeks, 4 days, 19 hours, 17 minutes, 24 seconds.
• To count from 1 to 21,001,868,507,844 would take you about one million, six hundred sixty-nine thousand, four hundred eighty-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 21001868507844 cubic inches would be around 2299.2 feet tall.

Recreational maths with 21001868507844

• 21001868507844 backwards is 44870586810012
• 21001868507844 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21001868507844's digits is 54
• More coming soon!