21664353472

Names of 21664353472

• Cardinal: 21664353472 can be written as Twenty-one billion, six hundred sixty-four million, three hundred fifty-three thousand, four hundred seventy-two.

Scientific notation

• Scientific notation: 2.1664353472 × 10¹⁰

Factors of 21664353472

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 2357

Divisors of 21664353472

• Number of divisors d(n): 84
• Complete list of divisors:
  1 2 4 8 16 31 32 62 64 124 163 248 326 496 652 961 992 1304 1922 1984 2161 2608 3844 4322 5053 5216 7688 8644 10106 10432 15376 17288 20212 30752 34576 40424 61504 66991 69152 80848 133982 138304 156643 161696 267964 313286 323392 352243 535928 626572 704486 1071856 1253144 1408972 2076721 2143712 2506288 2817944 4153442 4287424 5012576 5635888 8306884 10025152 10919533 11271776 16613768 21839066 22543552 33227536 43678132 66455072 87356264 132910144 174712528 338505523 349425056 677011046 698850112 1354022092 2708044184 5416088368 10832176736 21664353472
• Sum of all divisors σ(n): 44714925048
• Sum of proper divisors (its aliquot sum) s(n): 23050571576
• 21664353472 is an abundant number, because the sum of its proper divisors (23050571576) is greater than itself. Its abundance is 1386218104

Bases of 21664353472

• Binary: 10100001011010010111100110011000000₂
• Hexadecimal: 0x50B4BCCC0
• Base-36: 9YAEA4G

Squares and roots of 21664353472

• 21664353472 squared (21664353472²) is 469344211359758454784
• 21664353472 cubed (21664353472³) is 10168038894934884920981105410048
• The square root of 21664353472 is 147188.1566974735
• The cube root of 21664353472 is 2787.7163205661

Scales and comparisons

• 21,664,353,472 seconds is equal to 688 years, 44 weeks, 4 days, 19 hours, 57 minutes, 52 seconds.
• To count from 1 to 21,664,353,472 would take you about one thousand, three hundred seventy-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 21664353472 cubic inches would be around 232.3 feet tall.

Recreational maths with 21664353472

• 21664353472 backwards is 27435346612
• The number of decimal digits it has is: 11
• The sum of 21664353472's digits is 43
• More coming soon!