21491689500

Names of 21491689500

• Cardinal: 21491689500 can be written as Twenty-one billion, four hundred ninety-one million, six hundred eighty-nine thousand, five hundred.

Scientific notation

• Scientific notation: 2.14916895 × 10¹⁰

Factors of 21491689500

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 530669

Divisors of 21491689500

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 25 27 30 36 45 50 54 60 75 81 90 100 108 125 135 150 162 180 225 250 270 300 324 375 405 450 500 540 675 750 810 900 1125 1350 1500 1620 2025 2250 2700 3375 4050 4500 6750 8100 10125 13500 20250 40500 530659 1061318 1591977 2122636 2653295 3183954 4775931 5306590 6367908 7959885 9551862 10613180 13266475 14327793 15919770 19103724 23879655 26532950 28655586 31839540 39799425 42983379 47759310 53065900 57311172 66332375 71638965 79598850 85966758 95518620 119398275 132664750 143277930 159197700 171933516 198997125 214916895 238796550 265329500 286555860 358194825 397994250 429833790 477593100 596991375 716389650 795988500 859667580 1074584475 1193982750 1432779300 1790974125 2149168950 2387965500 3581948250 4298337900 5372922375 7163896500 10745844750 21491689500
• Sum of all divisors σ(n): 70117167120
• Sum of proper divisors (its aliquot sum) s(n): 48625477620
• 21491689500 is an abundant number, because the sum of its proper divisors (48625477620) is greater than itself. Its abundance is 27133788120

Bases of 21491689500

• Binary: 10100000001000000010010100000011100₂
• Hexadecimal: 0x50101281C
• Base-36: 9VFLHR0

Squares and roots of 21491689500

• 21491689500 squared (21491689500²) is 461892717564410250000
• 21491689500 cubed (21491689500³) is 9926854868205501343617375000000
• The square root of 21491689500 is 146600.4416773701
• The cube root of 21491689500 is 2780.2905644915

Scales and comparisons

• 21,491,689,500 seconds is equal to 683 years, 19 weeks, 1 day, 9 hours, 45 minutes.
• To count from 1 to 21,491,689,500 would take you about one thousand, three hundred sixty-six 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 21491689500 cubic inches would be around 231.7 feet tall.

Recreational maths with 21491689500

• 21491689500 backwards is 00598619412
• 21491689500 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21491689500's digits is 45
• More coming soon!