20640369728

Names of 20640369728

• Cardinal: 20640369728 can be written as Twenty billion, six hundred forty million, three hundred sixty-nine thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.0640369728 × 10¹⁰

Factors of 20640369728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 5011

Divisors of 20640369728

• Number of divisors d(n): 84
• Complete list of divisors:
  1 2 4 8 11 16 22 32 44 64 88 121 176 242 352 484 607 704 968 1214 1936 2428 3872 4391 4856 6677 7744 8782 9712 13354 17564 19424 26708 35128 38848 48301 53416 70256 73447 96602 106832 140512 146894 193204 213664 281024 293788 386408 427328 531311 587576 772816 1062622 1175152 1545632 2125244 2350304 2665337 3091264 4250488 4700608 5330674 8500976 10661348 17001952 21322696 29318707 34003904 42645392 58637414 85290784 117274828 170581568 234549656 322505777 469099312 645011554 938198624 1290023108 1876397248 2580046216 5160092432 10320184864 20640369728
• Sum of all divisors σ(n): 45104645376
• Sum of proper divisors (its aliquot sum) s(n): 24464275648
• 20640369728 is an abundant number, because the sum of its proper divisors (24464275648) is greater than itself. Its abundance is 3823905920

Bases of 20640369728

• Binary: 10011001110010000110000110001000000₂
• Hexadecimal: 0x4CE430C40
• Base-36: 9HCQR7K

Squares and roots of 20640369728

• 20640369728 squared (20640369728²) is 426024862508538793984
• 20640369728 cubed (20640369728³) is 8793310675496606264860982116352
• The square root of 20640369728 is 143667.5667226253
• The cube root of 20640369728 is 2743.0843190723

Scales and comparisons

• 20,640,369,728 seconds is equal to 656 years, 15 weeks, 4 days, 4 hours, 2 minutes, 8 seconds.
• To count from 1 to 20,640,369,728 would take you about one thousand, three hundred twelve 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 20640369728 cubic inches would be around 228.6 feet tall.

Recreational maths with 20640369728

• 20640369728 backwards is 82796304602
• The number of decimal digits it has is: 11
• The sum of 20640369728's digits is 47
• More coming soon!