21420480

Names of 21420480

• Cardinal: 21420480 can be written as Twenty-one million, four hundred twenty thousand, four hundred eighty.

Scientific notation

• Scientific notation: 2.142048 × 10⁷

Factors of 21420480

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 484

Divisors of 21420480

• Number of divisors d(n): 112
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 53 60 64 80 96 106 120 159 160 192 212 240 265 318 320 421 424 480 530 636 795 842 848 960 1060 1263 1272 1590 1684 1696 2105 2120 2526 2544 3180 3368 3392 4210 4240 5052 5088 6315 6360 6736 8420 8480 10104 10176 12630 12720 13472 16840 16960 20208 22313 25260 25440 26944 33680 40416 44626 50520 50880 66939 67360 80832 89252 101040 111565 133878 134720 178504 202080 223130 267756 334695 357008 404160 446260 535512 669390 714016 892520 1071024 1338780 1428032 1785040 2142048 2677560 3570080 4284096 5355120 7140160 10710240 21420480
• Sum of all divisors σ(n): 69457824
• Sum of proper divisors (its aliquot sum) s(n): 48037344
• 21420480 is an abundant number, because the sum of its proper divisors (48037344) is greater than itself. Its abundance is 26616864

Bases of 21420480

• Binary: 1010001101101100111000000₂
• Hexadecimal: 0x146D9C0
• Base-36: CR45C

Squares and roots of 21420480

• 21420480 squared (21420480²) is 458836963430400
• 21420480 cubed (21420480³) is 9828507998421614592000
• The square root of 21420480 is 4628.2264421699
• The cube root of 21420480 is 277.7216474437

Scales and comparisons

• 21,420,480 seconds is equal to 35 weeks, 2 days, 22 hours, 8 minutes.
• To count from 1 to 21,420,480 would take you about twenty-one 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 21420480 cubic inches would be around 23.1 feet tall.

Recreational maths with 21420480

• 21420480 backwards is 08402412
• The number of decimal digits it has is: 8
• The sum of 21420480's digits is 21
• More coming soon!