21136972680

Names of 21136972680

• Cardinal: 21136972680 can be written as Twenty-one billion, one hundred thirty-six million, nine hundred seventy-two thousand, six hundred eighty.

Scientific notation

• Scientific notation: 2.113697268 × 10¹⁰

Factors of 21136972680

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 6523767

Divisors of 21136972680

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 30 36 40 45 54 60 72 81 90 108 120 135 162 180 216 270 324 360 405 540 648 810 1080 1620 3240 6523757 13047514 19571271 26095028 32618785 39142542 52190056 58713813 65237570 78285084 97856355 117427626 130475140 156570168 176141439 195712710 234855252 260950280 293569065 352282878 391425420 469710504 528424317 587138130 704565756 782850840 880707195 1056848634 1174276260 1409131512 1761414390 2113697268 2348552520 2642121585 3522828780 4227394536 5284243170 7045657560 10568486340 21136972680
• Sum of all divisors σ(n): 71043724620
• Sum of proper divisors (its aliquot sum) s(n): 49906751940
• 21136972680 is an abundant number, because the sum of its proper divisors (49906751940) is greater than itself. Its abundance is 28769779260

Bases of 21136972680

• Binary: 10011101011110111001001101110001000₂
• Hexadecimal: 0x4EBDC9B88
• Base-36: 9PKEOI0

Squares and roots of 21136972680

• 21136972680 squared (21136972680²) is 446771614075066382400
• 21136972680 cubed (21136972680³) is 9443399400904181593975232832000
• The square root of 21136972680 is 145385.5999746881
• The cube root of 21136972680 is 2764.9095508259

Scales and comparisons

• 21,136,972,680 seconds is equal to 672 years, 4 weeks, 4 days, 21 hours, 18 minutes.
• To count from 1 to 21,136,972,680 would take you about one thousand, three hundred forty-four 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 21136972680 cubic inches would be around 230.4 feet tall.

Recreational maths with 21136972680

• 21136972680 backwards is 08627963112
• 21136972680 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21136972680's digits is 45
• More coming soon!