21051688464

Names of 21051688464

• Cardinal: 21051688464 can be written as Twenty-one billion, fifty-one million, six hundred eighty-eight thousand, four hundred sixty-four.

Scientific notation

• Scientific notation: 2.1051688464 × 10¹⁰

Factors of 21051688464

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 225

Divisors of 21051688464

• Number of divisors d(n): 135
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 36 48 72 107 113 144 214 226 321 339 428 452 642 678 856 904 963 1017 1284 1356 1712 1808 1926 2034 2568 2712 3852 4068 5136 5424 7704 8136 11449 12091 12769 15408 16272 22898 24182 25538 34347 36273 38307 45796 48364 51076 68694 72546 76614 91592 96728 102152 103041 108819 114921 137388 145092 153228 183184 193456 204304 206082 217638 229842 274776 290184 306456 412164 435276 459684 549552 580368 612912 824328 870552 919368 1293737 1366283 1648656 1741104 1838736 2587474 2732566 3881211 4098849 5174948 5465132 7762422 8197698 10349896 10930264 11643633 12296547 15524844 16395396 20699792 21860528 23287266 24593094 31049688 32790792 46574532 49186188 62099376 65581584 93149064 98372376 146192281 186298128 196744752 292384562 438576843 584769124 877153686 1169538248 1315730529 1754307372 2339076496 2631461058 3508614744 5262922116 7017229488 10525844232 21051688464
• Sum of all divisors σ(n): 60002198893
• Sum of proper divisors (its aliquot sum) s(n): 38950510429
• 21051688464 is an abundant number, because the sum of its proper divisors (38950510429) is greater than itself. Its abundance is 17898821965

Bases of 21051688464

• Binary: 10011100110110001110100011000010000₂
• Hexadecimal: 0x4E6C74610
• Base-36: 9O5MQS0

Squares and roots of 21051688464

• 21051688464 squared (21051688464²) is 443173587185310679296
• 21051688464 cubed (21051688464³) is 9329552292898503057591606841344
• 21051688464 is a perfect square number. Its square root is 145092
• The cube root of 21051688464 is 2761.1858861039

Scales and comparisons

• 21,051,688,464 seconds is equal to 669 years, 19 weeks, 4 days, 19 hours, 14 minutes, 24 seconds.
• To count from 1 to 21,051,688,464 would take you about one thousand, three hundred thirty-eight 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 21051688464 cubic inches would be around 230.1 feet tall.

Recreational maths with 21051688464

• 21051688464 backwards is 46488615012
• The number of decimal digits it has is: 11
• The sum of 21051688464's digits is 45
• More coming soon!