21309339840

Names of 21309339840

• Cardinal: 21309339840 can be written as Twenty-one billion, three hundred nine million, three hundred thirty-nine thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.130933984 × 10¹⁰

Factors of 21309339840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 363960

Divisors of 21309339840

• Number of divisors d(n): 112
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 61 64 80 96 120 122 160 183 192 240 244 305 320 366 480 488 610 732 915 960 976 1220 1464 1830 1952 2440 2928 3660 3904 4880 5856 7320 9760 11712 14640 19520 29280 58560 363889 727778 1091667 1455556 1819445 2183334 2911112 3638890 4366668 5458335 5822224 7277780 8733336 10916670 11644448 14555560 17466672 21833340 22197229 23288896 29111120 34933344 43666680 44394458 58222240 66591687 69866688 87333360 88788916 110986145 116444480 133183374 174666720 177577832 221972290 266366748 332958435 349333440 355155664 443944580 532733496 665916870 710311328 887889160 1065466992 1331833740 1420622656 1775778320 2130933984 2663667480 3551556640 4261867968 5327334960 7103113280 10654669920 21309339840
• Sum of all divisors σ(n): 68766476640
• Sum of proper divisors (its aliquot sum) s(n): 47457136800
• 21309339840 is an abundant number, because the sum of its proper divisors (47457136800) is greater than itself. Its abundance is 26147796960

Bases of 21309339840

• Binary: 10011110110001000101011100011000000₂
• Hexadecimal: 0x4F622B8C0
• Base-36: 9SF13UO

Squares and roots of 21309339840

• 21309339840 squared (21309339840²) is 454087964416611225600
• 21309339840 cubed (21309339840³) is 9676314751007395947469307904000
• The square root of 21309339840 is 145977.1894509549
• The cube root of 21309339840 is 2772.4049474099

Scales and comparisons

• 21,309,339,840 seconds is equal to 677 years, 29 weeks, 4 days, 21 hours, 4 minutes.
• To count from 1 to 21,309,339,840 would take you about one thousand, three hundred fifty-five 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 21309339840 cubic inches would be around 231 feet tall.

Recreational maths with 21309339840

• 21309339840 backwards is 04893390312
• The number of decimal digits it has is: 11
• The sum of 21309339840's digits is 42
• More coming soon!