20912640

Names of 20912640

• Cardinal: 20912640 can be written as Twenty million, nine hundred twelve thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.091264 × 10⁷

Factors of 20912640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 406

Divisors of 20912640

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 32 35 40 42 48 56 60 64 70 80 84 96 105 112 120 128 140 160 168 192 210 224 240 256 280 320 336 384 389 420 448 480 512 560 640 672 768 778 840 896 960 1120 1167 1280 1344 1536 1556 1680 1792 1920 1945 2240 2334 2560 2688 2723 3112 3360 3584 3840 3890 4480 4668 5376 5446 5835 6224 6720 7680 7780 8169 8960 9336 10752 10892 11670 12448 13440 13615 15560 16338 17920 18672 21784 23340 24896 26880 27230 31120 32676 37344 40845 43568 46680 49792 53760 54460 62240 65352 74688 81690 87136 93360 99584 108920 124480 130704 149376 163380 174272 186720 199168 217840 248960 261408 298752 326760 348544 373440 435680 497920 522816 597504 653520 697088 746880 871360 995840 1045632 1307040 1394176 1493760 1742720 2091264 2614080 2987520 3485440 4182528 5228160 6970880 10456320 20912640
• Sum of all divisors σ(n): 76602240
• Sum of proper divisors (its aliquot sum) s(n): 55689600
• 20912640 is an abundant number, because the sum of its proper divisors (55689600) is greater than itself. Its abundance is 34776960

Bases of 20912640

• Binary: 1001111110001101000000000₂
• Hexadecimal: 0x13F1A00
• Base-36: CG8AO

Squares and roots of 20912640

• 20912640 squared (20912640²) is 437338511769600
• 20912640 cubed (20912640³) is 9145902854773407744000
• The square root of 20912640 is 4573.0340038097
• The cube root of 20912640 is 275.5093150913

Scales and comparisons

• 20,912,640 seconds is equal to 34 weeks, 4 days, 1 hour, 4 minutes.
• To count from 1 to 20,912,640 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 20912640 cubic inches would be around 23 feet tall.

Recreational maths with 20912640

• 20912640 backwards is 04621902
• 20912640 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20912640's digits is 24
• More coming soon!