21424320

Names of 21424320

• Cardinal: 21424320 can be written as Twenty-one million, four hundred twenty-four thousand, three hundred twenty.

Scientific notation

• Scientific notation: 2.142432 × 10⁷

Factors of 21424320

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 226

Divisors of 21424320

• Number of divisors d(n): 168
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 32 36 40 43 45 48 60 64 72 80 86 90 96 120 129 144 160 172 173 180 192 215 240 258 288 320 344 346 360 387 430 480 516 519 576 645 688 692 720 774 860 865 960 1032 1038 1290 1376 1384 1440 1548 1557 1720 1730 1935 2064 2076 2580 2595 2752 2768 2880 3096 3114 3440 3460 3870 4128 4152 5160 5190 5536 6192 6228 6880 6920 7439 7740 7785 8256 8304 10320 10380 11072 12384 12456 13760 13840 14878 15480 15570 16608 20640 20760 22317 24768 24912 27680 29756 30960 31140 33216 37195 41280 41520 44634 49824 55360 59512 61920 62280 66951 74390 83040 89268 99648 111585 119024 123840 124560 133902 148780 166080 178536 223170 238048 249120 267804 297560 334755 357072 446340 476096 498240 535608 595120 669510 714144 892680 1071216 1190240 1339020 1428288 1785360 2142432 2380480 2678040 3570720 4284864 5356080 7141440 10712160 21424320
• Sum of all divisors σ(n): 75840336
• Sum of proper divisors (its aliquot sum) s(n): 54416016
• 21424320 is an abundant number, because the sum of its proper divisors (54416016) is greater than itself. Its abundance is 32991696

Bases of 21424320

• Binary: 1010001101110100011000000₂
• Hexadecimal: 0x146E8C0
• Base-36: CR740

Squares and roots of 21424320

• 21424320 squared (21424320²) is 459001487462400
• 21424320 cubed (21424320³) is 9833794747870445568000
• The square root of 21424320 is 4628.6412693143
• The cube root of 21424320 is 277.7382419583

Scales and comparisons

• 21,424,320 seconds is equal to 35 weeks, 2 days, 23 hours, 12 minutes.
• To count from 1 to 21,424,320 would take you about twenty-two 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 21424320 cubic inches would be around 23.1 feet tall.

Recreational maths with 21424320

• 21424320 backwards is 02342412
• 21424320 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21424320's digits is 18
• More coming soon!