21445842672

Names of 21445842672

• Cardinal: 21445842672 can be written as Twenty-one billion, four hundred forty-five million, eight hundred forty-two thousand, six hundred seventy-two.

Scientific notation

• Scientific notation: 2.1445842672 × 10¹⁰

Factors of 21445842672

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 650581

Divisors of 21445842672

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 36 48 72 144 229 458 687 916 1374 1832 2061 2748 3664 4122 5496 8244 10992 16488 32976 650347 1300694 1951041 2601388 3902082 5202776 5853123 7804164 10405552 11706246 15608328 23412492 31216656 46824984 93649968 148929463 297858926 446788389 595717852 893576778 1191435704 1340365167 1787153556 2382871408 2680730334 3574307112 5361460668 7148614224 10722921336 21445842672
• Sum of all divisors σ(n): 60280756120
• Sum of proper divisors (its aliquot sum) s(n): 38834913448
• 21445842672 is an abundant number, because the sum of its proper divisors (38834913448) is greater than itself. Its abundance is 17389070776

Bases of 21445842672

• Binary: 10011111110010001011001011011110000₂
• Hexadecimal: 0x4FE4596F0
• Base-36: 9UOAU40

Squares and roots of 21445842672

• 21445842672 squared (21445842672²) is 459924167912176099584
• 21445842672 cubed (21445842672³) is 9863461346095039344837068648448
• The square root of 21445842672 is 146443.9915872277
• The cube root of 21445842672 is 2778.3121524755

Scales and comparisons

• 21,445,842,672 seconds is equal to 681 years, 47 weeks, 2 days, 18 hours, 31 minutes, 12 seconds.
• To count from 1 to 21,445,842,672 would take you about one thousand, three hundred sixty-three 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 21445842672 cubic inches would be around 231.5 feet tall.

Recreational maths with 21445842672

• 21445842672 backwards is 27624854412
• The number of decimal digits it has is: 11
• The sum of 21445842672's digits is 45
• More coming soon!