21231468690

Names of 21231468690

• Cardinal: 21231468690 can be written as Twenty-one billion, two hundred thirty-one million, four hundred sixty-eight thousand, six hundred ninety.

Scientific notation

• Scientific notation: 2.123146869 × 10¹⁰

Factors of 21231468690

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 61907

Divisors of 21231468690

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 10 15 29 30 58 87 145 174 290 397 435 794 870 1191 1985 2382 3970 5955 11513 11910 23026 34539 57565 61471 69078 115130 122942 172695 184413 307355 345390 368826 614710 922065 1782659 1844130 3565318 5347977 8913295 10695954 17826590 24403987 26739885 48807974 53479770 73211961 122019935 146423922 244039870 366059805 707715623 732119610 1415431246 2123146869 3538578115 4246293738 7077156230 10615734345 21231468690
• Sum of all divisors σ(n): 52846248960
• Sum of proper divisors (its aliquot sum) s(n): 31614780270
• 21231468690 is an abundant number, because the sum of its proper divisors (31614780270) is greater than itself. Its abundance is 10383311580

Bases of 21231468690

• Binary: 10011110001011111101000000010010010₂
• Hexadecimal: 0x4F17E8092
• Base-36: 9R4O236

Squares and roots of 21231468690

• 21231468690 squared (21231468690²) is 450775262734450316100
• 21231468690 cubed (21231468690³) is 9570620876973005670637752909000
• The square root of 21231468690 is 145710.2216387031
• The cube root of 21231468690 is 2769.0237402985

Scales and comparisons

• 21,231,468,690 seconds is equal to 675 years, 4 weeks, 6 days, 14 hours, 11 minutes, 30 seconds.
• To count from 1 to 21,231,468,690 would take you about one thousand, three hundred fifty 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 21231468690 cubic inches would be around 230.8 feet tall.

Recreational maths with 21231468690

• 21231468690 backwards is 09686413212
• The number of decimal digits it has is: 11
• The sum of 21231468690's digits is 42
• More coming soon!