21243040

Names of 21243040

• Cardinal: 21243040 can be written as Twenty-one million, two hundred forty-three thousand and forty.

Scientific notation

• Scientific notation: 2.124304 × 10⁷

Factors of 21243040

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1486

Divisors of 21243040

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 16 20 26 28 32 35 40 52 56 65 70 80 91 104 112 130 140 160 182 208 224 260 280 364 416 455 520 560 728 910 1040 1120 1456 1459 1820 2080 2912 2918 3640 5836 7280 7295 10213 11672 14560 14590 18967 20426 23344 29180 37934 40852 46688 51065 58360 75868 81704 94835 102130 116720 132769 151736 163408 189670 204260 233440 265538 303472 326816 379340 408520 531076 606944 663845 758680 817040 1062152 1327690 1517360 1634080 2124304 2655380 3034720 4248608 5310760 10621520 21243040
• Sum of all divisors σ(n): 61810560
• Sum of proper divisors (its aliquot sum) s(n): 40567520
• 21243040 is an abundant number, because the sum of its proper divisors (40567520) is greater than itself. Its abundance is 19324480

Bases of 21243040

• Binary: 1010001000010010010100000₂
• Hexadecimal: 0x14424A0
• Base-36: CNB8G

Squares and roots of 21243040

• 21243040 squared (21243040²) is 451266748441600
• 21243040 cubed (21243040³) is 9586277587814846464000
• The square root of 21243040 is 4609.0172488287
• The cube root of 21243040 is 276.9526695187

Scales and comparisons

• 21,243,040 seconds is equal to 35 weeks, 20 hours, 50 minutes, 40 seconds.
• To count from 1 to 21,243,040 would take you about four days!

  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 21243040 cubic inches would be around 23.1 feet tall.

Recreational maths with 21243040

• 21243040 backwards is 04034212
• 21243040 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21243040's digits is 16
• More coming soon!