21497312655

Names of 21497312655

• Cardinal: 21497312655 can be written as Twenty-one billion, four hundred ninety-seven million, three hundred twelve thousand, six hundred fifty-five.

Scientific notation

• Scientific notation: 2.1497312655 × 10¹⁰

Factors of 21497312655

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 24072

Divisors of 21497312655

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 5 7 9 13 15 21 27 35 39 45 63 65 73 91 105 117 135 189 195 219 273 315 351 365 455 511 585 657 819 945 949 1095 1365 1533 1755 1971 2457 2555 2847 3285 4095 4599 4745 6643 7665 8541 9855 12285 13797 14235 19929 22995 23971 25623 33215 42705 59787 68985 71913 99645 119855 128115 167797 179361 215739 298935 311623 359565 503391 647217 838985 896805 934869 1078695 1510173 1558115 1749883 2181361 2516955 2804607 3236085 4530519 4674345 5249649 6544083 7550865 8413821 8749415 10906805 12249181 14023035 15748947 19632249 22652595 22748479 26248245 32720415 36747543 42069105 47246841 58896747 61245905 68245437 78744735 98161245 110242629 113742395 159239353 183737715 204736311 236234205 294483735 330727887 341227185 477718059 551213145 614208933 796196765 1023681555 1433154177 1653639435 2388590295 3071044665 4299462531 7165770885 21497312655
• Sum of all divisors σ(n): 47683184640
• Sum of proper divisors (its aliquot sum) s(n): 26185871985
• 21497312655 is an abundant number, because the sum of its proper divisors (26185871985) is greater than itself. Its abundance is 4688559330

Bases of 21497312655

• Binary: 10100000001010101101111010110001111₂
• Hexadecimal: 0x50156F58F
• Base-36: 9VIY0LR

Squares and roots of 21497312655

• 21497312655 squared (21497312655²) is 462134451386823149025
• 21497312655 cubed (21497312655³) is 9934648790109435581782083411375
• The square root of 21497312655 is 146619.6189293915
• The cube root of 21497312655 is 2780.5330247455

Scales and comparisons

• 21,497,312,655 seconds is equal to 683 years, 28 weeks, 3 days, 11 hours, 44 minutes, 15 seconds.
• To count from 1 to 21,497,312,655 would take you about one thousand, three hundred sixty-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 21497312655 cubic inches would be around 231.7 feet tall.

Recreational maths with 21497312655

• 21497312655 backwards is 55621379412
• 21497312655 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21497312655's digits is 45
• More coming soon!