21390309375

Names of 21390309375

• Cardinal: 21390309375 can be written as Twenty-one billion, three hundred ninety million, three hundred nine thousand, three hundred seventy-five.

Scientific notation

• Scientific notation: 2.1390309375 × 10¹⁰

Factors of 21390309375

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 2750

Divisors of 21390309375

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 5 15 25 29 75 87 125 145 375 435 625 725 841 1875 2175 2523 2713 3125 3625 4205 8139 9375 10875 12615 13565 18125 21025 40695 54375 63075 67825 78677 90625 105125 203475 236031 271875 315375 339125 393385 525625 1017375 1180155 1576875 1695625 1966925 2281633 2628125 5086875 5900775 6844899 7884375 8478125 9834625 11408165 25434375 29503875 34224495 49173125 57040825 147519375 171122475 245865625 285204125 737596875 855612375 1426020625 4278061875 7130103125 21390309375
• Sum of all divisors σ(n): 36933479856
• Sum of proper divisors (its aliquot sum) s(n): 15543170481
• 21390309375 is a deficient number, because the sum of its proper divisors (15543170481) is less than itself. Its deficiency is 5847138894

Bases of 21390309375

• Binary: 10011111010111101100011011111111111₂
• Hexadecimal: 0x4FAF637FF
• Base-36: 9TR8KCF

Squares and roots of 21390309375

• 21390309375 squared (21390309375²) is 457545335158212890625
• 21390309375 cubed (21390309375³) is 9787036272122238302581787109375
• The square root of 21390309375 is 146254.2627583891
• The cube root of 21390309375 is 2775.9119638783

Scales and comparisons

• 21,390,309,375 seconds is equal to 680 years, 7 weeks, 4 days, 36 minutes, 15 seconds.
• To count from 1 to 21,390,309,375 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 21390309375 cubic inches would be around 231.3 feet tall.

Recreational maths with 21390309375

• 21390309375 backwards is 57390309312
• The number of decimal digits it has is: 11
• The sum of 21390309375's digits is 42
• More coming soon!