21142520

Names of 21142520

• Cardinal: 21142520 can be written as Twenty-one million, one hundred forty-two thousand, five hundred twenty.

Scientific notation

• Scientific notation: 2.114252 × 10⁷

Factors of 21142520

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 104

Divisors of 21142520

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 7 8 10 14 20 23 28 35 40 46 49 56 67 70 92 98 115 134 140 161 184 196 230 245 268 280 322 335 343 392 460 469 490 536 644 670 686 805 920 938 980 1127 1288 1340 1372 1541 1610 1715 1876 1960 2254 2345 2680 2744 3082 3220 3283 3430 3752 4508 4690 5635 6164 6440 6566 6860 7705 7889 9016 9380 10787 11270 12328 13132 13720 15410 15778 16415 18760 21574 22540 22981 26264 30820 31556 32830 39445 43148 45080 45962 53935 61640 63112 65660 75509 78890 86296 91924 107870 114905 131320 151018 157780 183848 215740 229810 302036 315560 377545 431480 459620 528563 604072 755090 919240 1057126 1510180 2114252 2642815 3020360 4228504 5285630 10571260 21142520
• Sum of all divisors σ(n): 58752000
• Sum of proper divisors (its aliquot sum) s(n): 37609480
• 21142520 is an abundant number, because the sum of its proper divisors (37609480) is greater than itself. Its abundance is 16466960

Bases of 21142520

• Binary: 1010000101001101111111000₂
• Hexadecimal: 0x1429BF8
• Base-36: CL5O8

Squares and roots of 21142520

• 21142520 squared (21142520²) is 447006151950400
• 21142520 cubed (21142520³) is 9450836507734371008000
• The square root of 21142520 is 4598.0996074465
• The cube root of 21142520 is 276.5151409751

Scales and comparisons

• 21,142,520 seconds is equal to 34 weeks, 6 days, 16 hours, 55 minutes, 20 seconds.
• To count from 1 to 21,142,520 would take you about three 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 21142520 cubic inches would be around 23 feet tall.

Recreational maths with 21142520

• 21142520 backwards is 02524112
• The number of decimal digits it has is: 8
• The sum of 21142520's digits is 17
• More coming soon!