21164575840

Names of 21164575840

• Cardinal: 21164575840 can be written as Twenty-one billion, one hundred sixty-four million, five hundred seventy-five thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.116457584 × 10¹⁰

Factors of 21164575840

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 4561367

Divisors of 21164575840

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 4 5 8 10 16 20 29 32 40 58 80 116 145 160 232 290 464 580 928 1160 2320 4640 4561331 9122662 18245324 22806655 36490648 45613310 72981296 91226620 132278599 145962592 182453240 264557198 364906480 529114396 661392995 729812960 1058228792 1322785990 2116457584 2645571980 4232915168 5291143960 10582287920 21164575840
• Sum of all divisors σ(n): 51725504880
• Sum of proper divisors (its aliquot sum) s(n): 30560929040
• 21164575840 is an abundant number, because the sum of its proper divisors (30560929040) is greater than itself. Its abundance is 9396353200

Bases of 21164575840

• Binary: 10011101101100000011100110001100000₂
• Hexadecimal: 0x4ED81CC60
• Base-36: 9Q0UB8G

Squares and roots of 21164575840

• 21164575840 squared (21164575840²) is 447939270487111705600
• 21164575840 cubed (21164575840³) is 9480444661938749435722952704000
• The square root of 21164575840 is 145480.4998616653
• The cube root of 21164575840 is 2766.1126092973

Scales and comparisons

• 21,164,575,840 seconds is equal to 672 years, 50 weeks, 2 days, 8 hours, 50 minutes, 40 seconds.
• To count from 1 to 21,164,575,840 would take you about one thousand, three hundred forty-five 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 21164575840 cubic inches would be around 230.5 feet tall.

Recreational maths with 21164575840

• 21164575840 backwards is 04857546112
• The number of decimal digits it has is: 11
• The sum of 21164575840's digits is 43
• More coming soon!