21204446720

Names of 21204446720

• Cardinal: 21204446720 can be written as Twenty-one billion, two hundred four million, four hundred forty-six thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.120444672 × 10¹⁰

Factors of 21204446720

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 8282994

Divisors of 21204446720

• Number of divisors d(n): 40
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 64 80 128 160 256 320 512 640 1280 2560 8282987 16565974 33131948 41414935 66263896 82829870 132527792 165659740 265055584 331319480 530111168 662638960 1060222336 1325277920 2120444672 2650555840 4240889344 5301111680 10602223360 21204446720
• Sum of all divisors σ(n): 50840980344
• Sum of proper divisors (its aliquot sum) s(n): 29636533624
• 21204446720 is an abundant number, because the sum of its proper divisors (29636533624) is greater than itself. Its abundance is 8432086904

Bases of 21204446720

• Binary: 10011101111111000100010111000000000₂
• Hexadecimal: 0x4EFE22E00
• Base-36: 9QOKVSW

Squares and roots of 21204446720

• 21204446720 squared (21204446720²) is 449628560701318758400
• 21204446720 cubed (21204446720³) is 9534124859181399446229352448000
• The square root of 21204446720 is 145617.4670841379
• The cube root of 21204446720 is 2767.8484998441

Scales and comparisons

• 21,204,446,720 seconds is equal to 674 years, 12 weeks, 1 day, 20 hours, 5 minutes, 20 seconds.
• To count from 1 to 21,204,446,720 would take you about one thousand, three hundred forty-eight 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 21204446720 cubic inches would be around 230.7 feet tall.

Recreational maths with 21204446720

• 21204446720 backwards is 02764440212
• 21204446720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21204446720's digits is 32
• More coming soon!