20997540

Names of 20997540

• Cardinal: 20997540 can be written as Twenty million, nine hundred ninety-seven thousand, five hundred forty.

Scientific notation

• Scientific notation: 2.099754 × 10⁷

Factors of 20997540

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 165

Divisors of 20997540

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 30 31 36 45 53 60 62 71 90 93 106 124 142 155 159 180 186 212 213 265 279 284 310 318 355 372 426 465 477 530 558 620 636 639 710 795 852 930 954 1060 1065 1116 1278 1395 1420 1590 1643 1860 1908 2130 2201 2385 2556 2790 3180 3195 3286 3763 4260 4402 4770 4929 5580 6390 6572 6603 7526 8215 8804 9540 9858 11005 11289 12780 13206 14787 15052 16430 18815 19716 19809 22010 22578 24645 26412 29574 32860 33015 33867 37630 39618 44020 45156 49290 56445 59148 66030 67734 73935 75260 79236 98580 99045 112890 116653 132060 135468 147870 169335 198090 225780 233306 295740 338670 349959 396180 466612 583265 677340 699918 1049877 1166530 1399836 1749795 2099754 2333060 3499590 4199508 5249385 6999180 10498770 20997540
• Sum of all divisors σ(n): 67931136
• Sum of proper divisors (its aliquot sum) s(n): 46933596
• 20997540 is an abundant number, because the sum of its proper divisors (46933596) is greater than itself. Its abundance is 25936056

Bases of 20997540

• Binary: 1010000000110010110100100₂
• Hexadecimal: 0x14065A4
• Base-36: CI1T0

Squares and roots of 20997540

• 20997540 squared (20997540²) is 440896686051600
• 20997540 cubed (20997540³) is 9257745801235913064000
• The square root of 20997540 is 4582.3072790899
• The cube root of 20997540 is 275.8816442755

Scales and comparisons

• 20,997,540 seconds is equal to 34 weeks, 5 days, 39 minutes.
• To count from 1 to 20,997,540 would take you about twelve hours!

  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 20997540 cubic inches would be around 23 feet tall.

Recreational maths with 20997540

• 20997540 backwards is 04579902
• 20997540 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20997540's digits is 36
• More coming soon!