21205762740

Names of 21205762740

• Cardinal: 21205762740 can be written as Twenty-one billion, two hundred five million, seven hundred sixty-two thousand, seven hundred forty.

Scientific notation

• Scientific notation: 2.120576274 × 10¹⁰

Factors of 21205762740

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 13089987

Divisors of 21205762740

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 81 90 108 135 162 180 270 324 405 540 810 1620 13089977 26179954 39269931 52359908 65449885 78539862 117809793 130899770 157079724 196349655 235619586 261799540 353429379 392699310 471239172 589048965 706858758 785398620 1060288137 1178097930 1413717516 1767146895 2120576274 2356195860 3534293790 4241152548 5301440685 7068587580 10602881370 21205762740
• Sum of all divisors σ(n): 66523268196
• Sum of proper divisors (its aliquot sum) s(n): 45317505456
• 21205762740 is an abundant number, because the sum of its proper divisors (45317505456) is greater than itself. Its abundance is 24111742716

Bases of 21205762740

• Binary: 10011101111111101100100001010110100₂
• Hexadecimal: 0x4EFF642B4
• Base-36: 9QPD390

Squares and roots of 21205762740

• 21205762740 squared (21205762740²) is 449684373385172307600
• 21205762740 cubed (21205762740³) is 9535900129891534588983898824000
• The square root of 21205762740 is 145621.9857713799
• The cube root of 21205762740 is 2767.9057593531

Scales and comparisons

• 21,205,762,740 seconds is equal to 674 years, 14 weeks, 3 days, 1 hour, 39 minutes.
• To count from 1 to 21,205,762,740 would take you about one thousand, three hundred forty-eight 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 21205762740 cubic inches would be around 230.7 feet tall.

Recreational maths with 21205762740

• 21205762740 backwards is 04726750212
• 21205762740 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21205762740's digits is 36
• More coming soon!