21123664640

Names of 21123664640

• Cardinal: 21123664640 can be written as Twenty-one billion, one hundred twenty-three million, six hundred sixty-four thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.112366464 × 10¹⁰

Factors of 21123664640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 16168

Divisors of 21123664640

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 26 32 40 52 64 65 79 80 104 128 130 158 160 208 256 260 316 320 395 416 520 632 640 790 832 1027 1040 1264 1280 1580 1664 2054 2080 2528 3160 3328 4108 4160 5056 5135 6320 8216 8320 10112 10270 12640 16069 16432 16640 20224 20540 25280 32138 32864 41080 50560 64276 65728 80345 82160 101120 128552 131456 160690 164320 208897 257104 262912 321380 328640 417794 514208 642760 657280 835588 1028416 1044485 1269451 1285520 1314560 1671176 2056832 2088970 2538902 2571040 3342352 4113664 4177940 5077804 5142080 6347255 6684704 8355880 10155608 10284160 12694510 13369408 16502863 16711760 20311216 20568320 25389020 26738816 33005726 33423520 40622432 50778040 53477632 66011452 66847040 81244864 82514315 101556080 132022904 133694080 162489728 165028630 203112160 264045808 267388160 324979456 330057260 406224320 528091616 660114520 812448640 1056183232 1320229040 1624897280 2112366464 2640458080 4224732928 5280916160 10561832320 21123664640
• Sum of all divisors σ(n): 55183094400
• Sum of proper divisors (its aliquot sum) s(n): 34059429760
• 21123664640 is an abundant number, because the sum of its proper divisors (34059429760) is greater than itself. Its abundance is 12935765120

Bases of 21123664640

• Binary: 10011101011000100011000101100000000₂
• Hexadecimal: 0x4EB118B00
• Base-36: 9PCHFY8

Squares and roots of 21123664640

• 21123664640 squared (21123664640²) is 446209207823186329600
• 21123664640 cubed (21123664640³) is 9425573665337052442702905344000
• The square root of 21123664640 is 145339.8246868353
• The cube root of 21123664640 is 2764.3291578429

Scales and comparisons

• 21,123,664,640 seconds is equal to 671 years, 34 weeks, 4 days, 20 hours, 37 minutes, 20 seconds.
• To count from 1 to 21,123,664,640 would take you about one thousand, three hundred forty-three 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 21123664640 cubic inches would be around 230.4 feet tall.

Recreational maths with 21123664640

• 21123664640 backwards is 04646632112
• The number of decimal digits it has is: 11
• The sum of 21123664640's digits is 35
• More coming soon!