21480671728

Names of 21480671728

• Cardinal: 21480671728 can be written as Twenty-one billion, four hundred eighty million, six hundred seventy-one thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1480671728 × 10¹⁰

Factors of 21480671728

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1570

Divisors of 21480671728

• Number of divisors d(n): 40
• Complete list of divisors:
  1 2 4 8 16 97 194 388 776 1471 1552 2942 5884 9409 11768 18818 23536 37636 75272 142687 150544 285374 570748 912673 1141496 1825346 2282992 3650692 7301384 13840639 14602768 27681278 55362556 110725112 221450224 1342541983 2685083966 5370167932 10740335864 21480671728
• Sum of all divisors σ(n): 42080917760
• Sum of proper divisors (its aliquot sum) s(n): 20600246032
• 21480671728 is a deficient number, because the sum of its proper divisors (20600246032) is less than itself. Its deficiency is 880425696

Bases of 21480671728

• Binary: 10100000000010110010000100111110000₂
• Hexadecimal: 0x5005909F0
• Base-36: 9V91CDS

Squares and roots of 21480671728

• 21480671728 squared (21480671728²) is 461419257886098505984
• 21480671728 cubed (21480671728³) is 9911595607628657221713547620352
• The square root of 21480671728 is 146562.8593061695
• The cube root of 21480671728 is 2779.8153754863

Scales and comparisons

• 21,480,671,728 seconds is equal to 683 years, 6 days, 21 hours, 15 minutes, 28 seconds.
• To count from 1 to 21,480,671,728 would take you about one thousand, three hundred sixty-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 21480671728 cubic inches would be around 231.7 feet tall.

Recreational maths with 21480671728

• 21480671728 backwards is 82717608412
• The number of decimal digits it has is: 11
• The sum of 21480671728's digits is 46
• More coming soon!