21001196720

Names of 21001196720

• Cardinal: 21001196720 can be written as Twenty-one billion, one million, one hundred ninety-six thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.100119672 × 10¹⁰

Factors of 21001196720

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 37502151

Divisors of 21001196720

• Number of divisors d(n): 40
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 35 40 56 70 80 112 140 280 560 37502137 75004274 150008548 187510685 262514959 300017096 375021370 525029918 600034192 750042740 1050059836 1312574795 1500085480 2100119672 2625149590 3000170960 4200239344 5250299180 10500598360 21001196720
• Sum of all divisors σ(n): 55803181344
• Sum of proper divisors (its aliquot sum) s(n): 34801984624
• 21001196720 is an abundant number, because the sum of its proper divisors (34801984624) is greater than itself. Its abundance is 13800787904

Bases of 21001196720

• Binary: 10011100011110001001101010010110000₂
• Hexadecimal: 0x4E3C4D4B0
• Base-36: 9NBKJ3K

Squares and roots of 21001196720

• 21001196720 squared (21001196720²) is 441050263672138758400
• 21001196720 cubed (21001196720³) is 9262583350786455648294952448000
• The square root of 21001196720 is 144917.8964793513
• The cube root of 21001196720 is 2758.9765826831

Scales and comparisons

• 21,001,196,720 seconds is equal to 667 years, 40 weeks, 1 day, 9 hours, 45 minutes, 20 seconds.
• To count from 1 to 21,001,196,720 would take you about one thousand, three hundred thirty-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 21001196720 cubic inches would be around 229.9 feet tall.

Recreational maths with 21001196720

• 21001196720 backwards is 02769110012
• The number of decimal digits it has is: 11
• The sum of 21001196720's digits is 29
• More coming soon!