20720640

Names of 20720640

• Cardinal: 20720640 can be written as Twenty million, seven hundred twenty thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.072064 × 10⁷

Factors of 20720640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 100

Divisors of 20720640

• Number of divisors d(n): 176
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 19 20 24 30 32 38 40 48 57 60 64 71 76 80 95 96 114 120 128 142 152 160 190 192 213 228 240 256 284 285 304 320 355 380 384 426 456 480 512 568 570 608 640 710 760 768 852 912 960 1024 1065 1136 1140 1216 1280 1349 1420 1520 1536 1704 1824 1920 2130 2272 2280 2432 2560 2698 2840 3040 3072 3408 3648 3840 4047 4260 4544 4560 4864 5120 5396 5680 6080 6745 6816 7296 7680 8094 8520 9088 9120 9728 10792 11360 12160 13490 13632 14592 15360 16188 17040 18176 18240 19456 20235 21584 22720 24320 26980 27264 29184 32376 34080 36352 36480 40470 43168 45440 48640 53960 54528 58368 64752 68160 72704 72960 80940 86336 90880 97280 107920 109056 129504 136320 145920 161880 172672 181760 215840 218112 259008 272640 291840 323760 345344 363520 431680 518016 545280 647520 690688 863360 1036032 1090560 1295040 1381376 1726720 2072064 2590080 3453440 4144128 5180160 6906880 10360320 20720640
• Sum of all divisors σ(n): 70744320
• Sum of proper divisors (its aliquot sum) s(n): 50023680
• 20720640 is an abundant number, because the sum of its proper divisors (50023680) is greater than itself. Its abundance is 29303040

Bases of 20720640

• Binary: 1001111000010110000000000₂
• Hexadecimal: 0x13C2C00
• Base-36: CC45C

Squares and roots of 20720640

• 20720640 squared (20720640²) is 429344922009600
• 20720640 cubed (20720640³) is 8896301564788998144000
• The square root of 20720640 is 4551.9929701175
• The cube root of 20720640 is 274.6635665385

Scales and comparisons

• 20,720,640 seconds is equal to 34 weeks, 1 day, 19 hours, 44 minutes.
• To count from 1 to 20,720,640 would take you about fifty-one weeks!

  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 20720640 cubic inches would be around 22.9 feet tall.

Recreational maths with 20720640

• 20720640 backwards is 04602702
• The number of decimal digits it has is: 8
• The sum of 20720640's digits is 21
• More coming soon!