21319740

Names of 21319740

• Cardinal: 21319740 can be written as Twenty-one million, three hundred nineteen thousand, seven hundred forty.

Scientific notation

• Scientific notation: 2.131974 × 10⁷

Factors of 21319740

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3060

Divisors of 21319740

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 13 15 18 20 26 27 30 36 39 45 52 54 60 65 78 90 108 117 130 135 156 180 195 234 260 270 351 390 468 540 585 702 780 1170 1404 1755 2340 3037 3510 6074 7020 9111 12148 15185 18222 27333 30370 36444 39481 45555 54666 60740 78962 81999 91110 109332 118443 136665 157924 163998 182220 197405 236886 273330 327996 355329 394810 409995 473772 546660 592215 710658 789620 819990 1065987 1184430 1421316 1639980 1776645 2131974 2368860 3553290 4263948 5329935 7106580 10659870 21319740
• Sum of all divisors σ(n): 71453760
• Sum of proper divisors (its aliquot sum) s(n): 50134020
• 21319740 is an abundant number, because the sum of its proper divisors (50134020) is greater than itself. Its abundance is 28814280

Bases of 21319740

• Binary: 1010001010101000000111100₂
• Hexadecimal: 0x145503C
• Base-36: COYF0

Squares and roots of 21319740

• 21319740 squared (21319740²) is 454531313667600
• 21319740 cubed (21319740³) is 9690489429251678424000
• The square root of 21319740 is 4617.3303975349
• The cube root of 21319740 is 277.2855904059

Scales and comparisons

• 21,319,740 seconds is equal to 35 weeks, 1 day, 18 hours, 9 minutes.
• To count from 1 to 21,319,740 would take you about six 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 21319740 cubic inches would be around 23.1 feet tall.

Recreational maths with 21319740

• 21319740 backwards is 04791312
• 21319740 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21319740's digits is 27
• More coming soon!