21345200

Names of 21345200

• Cardinal: 21345200 can be written as Twenty-one million, three hundred forty-five thousand, two hundred.

Scientific notation

• Scientific notation: 2.13452 × 10⁷

Factors of 21345200

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 140

Divisors of 21345200

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 5 8 10 16 17 20 25 34 40 43 50 68 73 80 85 86 100 136 146 170 172 200 215 272 292 340 344 365 400 425 430 584 680 688 730 731 850 860 1075 1168 1241 1360 1460 1462 1700 1720 1825 2150 2482 2920 2924 3139 3400 3440 3650 3655 4300 4964 5840 5848 6205 6278 6800 7300 7310 8600 9928 11696 12410 12556 14600 14620 15695 17200 18275 19856 24820 25112 29200 29240 31025 31390 36550 49640 50224 53363 58480 62050 62780 73100 78475 99280 106726 124100 125560 146200 156950 213452 248200 251120 266815 292400 313900 426904 496400 533630 627800 853808 1067260 1255600 1334075 2134520 2668150 4269040 5336300 10672600 21345200
• Sum of all divisors σ(n): 56322288
• Sum of proper divisors (its aliquot sum) s(n): 34977088
• 21345200 is an abundant number, because the sum of its proper divisors (34977088) is greater than itself. Its abundance is 13631888

Bases of 21345200

• Binary: 1010001011011001110110000₂
• Hexadecimal: 0x145B3B0
• Base-36: CPI28

Squares and roots of 21345200

• 21345200 squared (21345200²) is 455617563040000
• 21345200 cubed (21345200³) is 9725248006601408000000
• The square root of 21345200 is 4620.0865792753
• The cube root of 21345200 is 277.3959245027

Scales and comparisons

• 21,345,200 seconds is equal to 35 weeks, 2 days, 1 hour, 13 minutes, 20 seconds.
• To count from 1 to 21,345,200 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 21345200 cubic inches would be around 23.1 feet tall.

Recreational maths with 21345200

• 21345200 backwards is 00254312
• 21345200 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21345200's digits is 17
• More coming soon!