21720320987620

Names of 21720320987620

• Cardinal: 21720320987620 can be written as Twenty-one trillion, seven hundred twenty billion, three hundred twenty million, nine hundred eighty-seven thousand, six hundred twenty.

Scientific notation

• Scientific notation: 2.172032098762 × 10¹³

Factors of 21720320987620

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 6709

Divisors of 21720320987620

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 5 10 20 29 58 116 145 290 580 841 1682 3364 4205 6673 8410 13346 16820 24389 26692 33365 48778 66730 97556 121945 133460 193517 243890 387034 487780 774068 967585 1935170 3870340 5611993 11223986 22447972 28059965 44528929 56119930 89057858 112239860 162747797 178115716 222644645 325495594 445289290 650991188 813738985 890578580 1291338941 1627477970 2582677882 3254955940 5165355764 6456694705 12913389410 25826778820 37448829289 74897658578 149795317156 187244146445 374488292890 748976585780 1086016049381 2172032098762 4344064197524 5430080246905 10860160493810 21720320987620
• Sum of all divisors σ(n): 47248711934760
• Sum of proper divisors (its aliquot sum) s(n): 25528390947140
• 21720320987620 is an abundant number, because the sum of its proper divisors (25528390947140) is greater than itself. Its abundance is 3808069959520

Bases of 21720320987620

• Binary: 100111100000100101000000001000101000111100100₂
• Hexadecimal: 0x13C1280451E4
• Base-36: 7P66EBAW4

Squares and roots of 21720320987620

• 21720320987620 squared (21720320987620²) is 471772343805245852193264400
• 21720320987620 cubed (21720320987620³) is 10247046740531759777247313155719786728000
• The square root of 21720320987620 is 4660506.5162082973
• The cube root of 21720320987620 is 27901.1484424339

Scales and comparisons

• 21,720,320,987,620 seconds is equal to 690,639 years, 1 week, 1 day, 33 minutes, 40 seconds.
• To count from 1 to 21,720,320,987,620 would take you about one million, seven hundred twenty-six thousand, five hundred ninety-seven 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 21720320987620 cubic inches would be around 2325.1 feet tall.

Recreational maths with 21720320987620

• 21720320987620 backwards is 02678902302712
• The number of decimal digits it has is: 14
• The sum of 21720320987620's digits is 49
• More coming soon!