21299428864

Names of 21299428864

• Cardinal: 21299428864 can be written as Twenty-one billion, two hundred ninety-nine million, four hundred twenty-eight thousand, eight hundred sixty-four.

Scientific notation

• Scientific notation: 2.1299428864 × 10¹⁰

Factors of 21299428864

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 38019

Divisors of 21299428864

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 7 8 14 16 28 32 56 64 112 128 157 224 256 314 448 512 628 896 1099 1256 1792 2198 2512 3584 4396 5024 8792 10048 17584 20096 35168 37853 40192 70336 75706 80384 140672 151412 264971 281344 302824 529942 562688 605648 1059884 1211296 2119768 2422592 4239536 4845184 5942921 8479072 9690368 11885842 16958144 19380736 23771684 33916288 41600447 47543368 67832576 83200894 95086736 135665152 166401788 190173472 332803576 380346944 665607152 760693888 1331214304 1521387776 2662428608 3042775552 5324857216 10649714432 21299428864
• Sum of all divisors σ(n): 48947947488
• Sum of proper divisors (its aliquot sum) s(n): 27648518624
• 21299428864 is an abundant number, because the sum of its proper divisors (27648518624) is greater than itself. Its abundance is 6349089760

Bases of 21299428864

• Binary: 10011110101100010110111111000000000₂
• Hexadecimal: 0x4F58B7E00
• Base-36: 9S94OHS

Squares and roots of 21299428864

• 21299428864 squared (21299428864²) is 453665669932596330496
• 21299428864 cubed (21299428864³) is 9662819664768239216226985836544
• The square root of 21299428864 is 145943.2385004527
• The cube root of 21299428864 is 2771.9750654883

Scales and comparisons

• 21,299,428,864 seconds is equal to 677 years, 13 weeks, 2 days, 4 hours, 1 minute, 4 seconds.
• To count from 1 to 21,299,428,864 would take you about one thousand, three hundred fifty-four 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 21299428864 cubic inches would be around 231 feet tall.

Recreational maths with 21299428864

• 21299428864 backwards is 46882499212
• The number of decimal digits it has is: 11
• The sum of 21299428864's digits is 55
• More coming soon!