20971872

Names of 20971872

• Cardinal: 20971872 can be written as Twenty million, nine hundred seventy-one thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 2.0971872 × 10⁷

Factors of 20971872

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 65

Divisors of 20971872

• Number of divisors d(n): 168
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 29 31 32 36 48 54 58 62 72 81 87 93 96 108 116 124 144 162 174 186 216 232 243 248 261 279 288 324 348 372 432 464 486 496 522 558 648 696 729 744 783 837 864 899 928 972 992 1044 1116 1296 1392 1458 1488 1566 1674 1798 1944 2088 2232 2349 2511 2592 2697 2784 2916 2976 3132 3348 3596 3888 4176 4464 4698 5022 5394 5832 6264 6696 7047 7192 7533 7776 8091 8352 8928 9396 10044 10788 11664 12528 13392 14094 14384 15066 16182 18792 20088 21141 21576 22599 23328 24273 25056 26784 28188 28768 30132 32364 37584 40176 42282 43152 45198 48546 56376 60264 64728 72819 75168 80352 84564 86304 90396 97092 112752 120528 129456 145638 169128 180792 194184 218457 225504 241056 258912 291276 338256 361584 388368 436914 582552 655371 676512 723168 776736 873828 1165104 1310742 1747656 2330208 2621484 3495312 5242968 6990624 10485936 20971872
• Sum of all divisors σ(n): 66104640
• Sum of proper divisors (its aliquot sum) s(n): 45132768
• 20971872 is an abundant number, because the sum of its proper divisors (45132768) is greater than itself. Its abundance is 24160896

Bases of 20971872

• Binary: 1010000000000000101100000₂
• Hexadecimal: 0x1400160
• Base-36: CHI00

Squares and roots of 20971872

• 20971872 squared (20971872²) is 439819415184384
• 20971872 cubed (20971872³) is 9223836478361757646848
• The square root of 20971872 is 4579.5056501767
• The cube root of 20971872 is 275.7691832049

Scales and comparisons

• 20,971,872 seconds is equal to 34 weeks, 4 days, 17 hours, 31 minutes, 12 seconds.
• To count from 1 to 20,971,872 would take you about 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 20971872 cubic inches would be around 23 feet tall.

Recreational maths with 20971872

• 20971872 backwards is 27817902
• 20971872 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20971872's digits is 36
• More coming soon!