21009521664

Names of 21009521664

• Cardinal: 21009521664 can be written as Twenty-one billion, nine million, five hundred twenty-one thousand, six hundred sixty-four.

Scientific notation

• Scientific notation: 2.1009521664 × 10¹⁰

Factors of 21009521664

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 759898

Divisors of 21009521664

• Number of divisors d(n): 88
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 64 72 96 108 128 144 192 216 256 288 384 432 512 576 768 864 1024 1152 1536 1728 2304 3072 3456 4608 6912 9216 13824 27648 759893 1519786 2279679 3039572 4559358 6079144 6839037 9118716 12158288 13678074 18237432 20517111 24316576 27356148 36474864 41034222 48633152 54712296 72949728 82068444 97266304 109424592 145899456 164136888 194532608 218849184 291798912 328273776 389065216 437698368 583597824 656547552 778130432 875396736 1167195648 1313095104 1750793472 2334391296 2626190208 3501586944 5252380416 7003173888 10504760832 21009521664
• Sum of all divisors σ(n): 62220120720
• Sum of proper divisors (its aliquot sum) s(n): 41210599056
• 21009521664 is an abundant number, because the sum of its proper divisors (41210599056) is greater than itself. Its abundance is 20201077392

Bases of 21009521664

• Binary: 10011100100010000111101110000000000₂
• Hexadecimal: 0x4E443DC00
• Base-36: 9NGIYO0

Squares and roots of 21009521664

• 21009521664 squared (21009521664²) is 441400000550085328896
• 21009521664 cubed (21009521664³) is 9273602874046629634489077202944
• The square root of 21009521664 is 144946.6166007335
• The cube root of 21009521664 is 2759.3410903445

Scales and comparisons

• 21,009,521,664 seconds is equal to 668 years, 1 week, 6 days, 18 hours, 14 minutes, 24 seconds.
• To count from 1 to 21,009,521,664 would take you about one thousand, three hundred thirty-six 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 21009521664 cubic inches would be around 229.9 feet tall.

Recreational maths with 21009521664

• 21009521664 backwards is 46612590012
• 21009521664 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21009521664's digits is 36
• More coming soon!