21154320

Names of 21154320

• Cardinal: 21154320 can be written as Twenty-one million, one hundred fifty-four thousand, three hundred twenty.

Scientific notation

• Scientific notation: 2.115432 × 10⁷

Factors of 21154320

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 2692

Divisors of 21154320

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 30 33 36 40 44 45 48 55 60 66 72 80 88 90 99 110 120 132 144 165 176 180 198 220 240 264 330 360 396 440 495 528 660 720 792 880 990 1320 1584 1980 2640 2671 3960 5342 7920 8013 10684 13355 16026 21368 24039 26710 29381 32052 40065 42736 48078 53420 58762 64104 80130 88143 96156 106840 117524 120195 128208 146905 160260 176286 192312 213680 235048 240390 264429 293810 320520 352572 384624 440715 470096 480780 528858 587620 641040 705144 881430 961560 1057716 1175240 1322145 1410288 1762860 1923120 2115432 2350480 2644290 3525720 4230864 5288580 7051440 10577160 21154320
• Sum of all divisors σ(n): 77530752
• Sum of proper divisors (its aliquot sum) s(n): 56376432
• 21154320 is an abundant number, because the sum of its proper divisors (56376432) is greater than itself. Its abundance is 35222112

Bases of 21154320

• Binary: 1010000101100101000010000₂
• Hexadecimal: 0x142CA10
• Base-36: CLES0

Squares and roots of 21154320

• 21154320 squared (21154320²) is 447505254662400
• 21154320 cubed (21154320³) is 9466669358809901568000
• The square root of 21154320 is 4599.3825672583
• The cube root of 21154320 is 276.5665740087

Scales and comparisons

• 21,154,320 seconds is equal to 34 weeks, 6 days, 20 hours, 12 minutes.
• To count from 1 to 21,154,320 would take you about three 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 21154320 cubic inches would be around 23 feet tall.

Recreational maths with 21154320

• 21154320 backwards is 02345112
• 21154320 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21154320's digits is 18
• More coming soon!