21665147904

Names of 21665147904

• Cardinal: 21665147904 can be written as Twenty-one billion, six hundred sixty-five million, one hundred forty-seven thousand, nine hundred four.

Scientific notation

• Scientific notation: 2.1665147904 × 10¹⁰

Factors of 21665147904

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 32281

Divisors of 21665147904

• Number of divisors d(n): 132
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 32 36 48 64 72 73 96 128 144 146 192 219 256 288 292 384 438 512 576 584 657 768 876 1024 1152 1168 1314 1536 1752 2304 2336 2628 3072 3504 4608 4672 5256 7008 9216 9344 10512 14016 18688 21024 28032 32203 37376 42048 56064 64406 74752 84096 96609 112128 128812 168192 193218 224256 257624 289827 336384 386436 515248 579654 672768 772872 1030496 1159308 1545744 2060992 2318616 2350819 3091488 4121984 4637232 4701638 6182976 7052457 8243968 9274464 9403276 12365952 14104914 16487936 18548928 18806552 21157371 24731904 28209828 32975872 37097856 37613104 42314742 49463808 56419656 74195712 75226208 84629484 98927616 112839312 148391424 150452416 169258968 225678624 296782848 300904832 338517936 451357248 601809664 677035872 902714496 1203619328 1354071744 1805428992 2407238656 2708143488 3610857984 5416286976 7221715968 10832573952 21665147904
• Sum of all divisors σ(n): 63416567656
• Sum of proper divisors (its aliquot sum) s(n): 41751419752
• 21665147904 is an abundant number, because the sum of its proper divisors (41751419752) is greater than itself. Its abundance is 20086271848

Bases of 21665147904

• Binary: 10100001011010101111110110000000000₂
• Hexadecimal: 0x50B57EC00
• Base-36: 9YAVB40

Squares and roots of 21665147904

• 21665147904 squared (21665147904²) is 469378633702195593216
• 21665147904 cubed (21665147904³) is 10169157522135506616561659019264
• The square root of 21665147904 is 147190.8553681241
• The cube root of 21665147904 is 2787.7503953421

Scales and comparisons

• 21,665,147,904 seconds is equal to 688 years, 46 weeks, 38 minutes, 24 seconds.
• To count from 1 to 21,665,147,904 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 21665147904 cubic inches would be around 232.3 feet tall.

Recreational maths with 21665147904

• 21665147904 backwards is 40974156612
• The number of decimal digits it has is: 11
• The sum of 21665147904's digits is 45
• More coming soon!