21003789440

Names of 21003789440

• Cardinal: 21003789440 can be written as Twenty-one billion, three million, seven hundred eighty-nine thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.100378944 × 10¹⁰

Factors of 21003789440

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 32818428

Divisors of 21003789440

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 64 80 128 160 320 640 32818421 65636842 131273684 164092105 262547368 328184210 525094736 656368420 1050189472 1312736840 2100378944 2625473680 4200757888 5250947360 10501894720 21003789440
• Sum of all divisors σ(n): 50212185660
• Sum of proper divisors (its aliquot sum) s(n): 29208396220
• 21003789440 is an abundant number, because the sum of its proper divisors (29208396220) is greater than itself. Its abundance is 8204606780

Bases of 21003789440

• Binary: 10011100011111011000110010010000000₂
• Hexadecimal: 0x4E3EC6480
• Base-36: 9ND43NK

Squares and roots of 21003789440

• 21003789440 squared (21003789440²) is 441159170839855513600
• 21003789440 cubed (21003789440³) is 9266014333845313167677456384000
• The square root of 21003789440 is 144926.8416822779
• The cube root of 21003789440 is 2759.0901152517

Scales and comparisons

• 21,003,789,440 seconds is equal to 667 years, 44 weeks, 3 days, 9 hours, 57 minutes, 20 seconds.
• To count from 1 to 21,003,789,440 would take you about one thousand, three hundred thirty-five 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 21003789440 cubic inches would be around 229.9 feet tall.

Recreational maths with 21003789440

• 21003789440 backwards is 04498730012
• The number of decimal digits it has is: 11
• The sum of 21003789440's digits is 38
• More coming soon!