21109616990

Names of 21109616990

• Cardinal: 21109616990 can be written as Twenty-one billion, one hundred nine million, six hundred sixteen thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 2.110961699 × 10¹⁰

Factors of 21109616990

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2004

Divisors of 21109616990

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 5 7 10 11 14 22 35 49 55 70 77 98 110 154 245 385 490 539 770 1078 1979 2695 3958 5390 9895 13853 19790 21769 27706 43538 69265 96971 108845 138530 152383 193942 217690 304766 484855 761915 969710 1066681 1523830 2133362 3916441 5333405 7832882 10666810 19582205 27415087 39164410 43080851 54830174 86161702 137075435 191905609 215404255 274150870 301565957 383811218 430808510 603131914 959528045 1507829785 1919056090 2110961699 3015659570 4221923398 10554808495 21109616990
• Sum of all divisors σ(n): 48243599352
• Sum of proper divisors (its aliquot sum) s(n): 27133982362
• 21109616990 is an abundant number, because the sum of its proper divisors (27133982362) is greater than itself. Its abundance is 6024365372

Bases of 21109616990

• Binary: 10011101010001110110011000101011110₂
• Hexadecimal: 0x4EA3B315E
• Base-36: 9P44CPQ

Squares and roots of 21109616990

• 21109616990 squared (21109616990²) is 445615929464496660100
• 21109616990 cubed (21109616990³) is 9406781595638380297845215099000
• The square root of 21109616990 is 145291.4897370109
• The cube root of 21109616990 is 2763.7162443103

Scales and comparisons

• 21,109,616,990 seconds is equal to 671 years, 11 weeks, 3 days, 6 hours, 29 minutes, 50 seconds.
• To count from 1 to 21,109,616,990 would take you about one thousand, three hundred forty-two 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 21109616990 cubic inches would be around 230.3 feet tall.

Recreational maths with 21109616990

• 21109616990 backwards is 09961690112
• The number of decimal digits it has is: 11
• The sum of 21109616990's digits is 44
• More coming soon!