21390268137

Names of 21390268137

• Cardinal: 21390268137 can be written as Twenty-one billion, three hundred ninety million, two hundred sixty-eight thousand, one hundred thirty-seven.

Scientific notation

• Scientific notation: 2.1390268137 × 10¹⁰

Factors of 21390268137

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 4994

Divisors of 21390268137

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 7 21 29 41 87 123 181 203 287 543 609 861 1189 1267 3567 3801 4733 5249 7421 8323 14199 15747 22263 24969 33131 36743 51947 99393 110229 137257 155841 194053 215209 411771 582159 645627 856673 960799 1358371 1506463 2570019 2882397 4075113 4519389 5627537 5996711 16882611 17990133 24843517 35123593 39392759 74530551 105370779 118178277 173904619 245865151 521713857 737595453 1018584197 3055752591 7130089379 21390268137
• Sum of all divisors σ(n): 34739228160
• Sum of proper divisors (its aliquot sum) s(n): 13348960023
• 21390268137 is a deficient number, because the sum of its proper divisors (13348960023) is less than itself. Its deficiency is 8041308114

Bases of 21390268137

• Binary: 10011111010111101011001011011101001₂
• Hexadecimal: 0x4FAF596E9
• Base-36: 9TR7OIX

Squares and roots of 21390268137

• 21390268137 squared (21390268137²) is 457543570972757450769
• 21390268137 cubed (21390268137³) is 9786979667467771794213486847353
• The square root of 21390268137 is 146254.1217778153
• The cube root of 21390268137 is 2775.9101799999

Scales and comparisons

• 21,390,268,137 seconds is equal to 680 years, 7 weeks, 3 days, 13 hours, 8 minutes, 57 seconds.
• To count from 1 to 21,390,268,137 would take you about one thousand, three hundred sixty 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 21390268137 cubic inches would be around 231.3 feet tall.

Recreational maths with 21390268137

• 21390268137 backwards is 73186209312
• The number of decimal digits it has is: 11
• The sum of 21390268137's digits is 42
• More coming soon!