21213451880

Names of 21213451880

• Cardinal: 21213451880 can be written as Twenty-one billion, two hundred thirteen million, four hundred fifty-one thousand, eight hundred eighty.

Scientific notation

• Scientific notation: 2.121345188 × 10¹⁰

Factors of 21213451880

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 18902

Divisors of 21213451880

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 5 8 10 20 40 47 94 188 235 376 470 619 940 1238 1880 2476 3095 4952 6190 12380 18229 24760 29093 36458 58186 72916 91145 116372 145465 145832 182290 232744 290930 364580 581860 729160 856763 1163720 1713526 3427052 4283815 6854104 8567630 11283751 17135260 22567502 34270520 45135004 56418755 90270008 112837510 225675020 451350040 530336297 1060672594 2121345188 2651681485 4242690376 5303362970 10606725940 21213451880
• Sum of all divisors σ(n): 48827232000
• Sum of proper divisors (its aliquot sum) s(n): 27613780120
• 21213451880 is an abundant number, because the sum of its proper divisors (27613780120) is greater than itself. Its abundance is 6400328240

Bases of 21213451880

• Binary: 10011110000011010111001011001101000₂
• Hexadecimal: 0x4F06B9668
• Base-36: 9QTXW88

Squares and roots of 21213451880

• 21213451880 squared (21213451880²) is 450010540665075534400
• 21213451880 cubed (21213451880³) is 9546276949891363045559684672000
• The square root of 21213451880 is 145648.3844057327
• The cube root of 21213451880 is 2768.2402634423

Scales and comparisons

• 21,213,451,880 seconds is equal to 674 years, 27 weeks, 1 day, 1 hour, 31 minutes, 20 seconds.
• To count from 1 to 21,213,451,880 would take you about one thousand, three hundred forty-nine 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 21213451880 cubic inches would be around 230.7 feet tall.

Recreational maths with 21213451880

• 21213451880 backwards is 08815431212
• The number of decimal digits it has is: 11
• The sum of 21213451880's digits is 35
• More coming soon!