21009630

Names of 21009630

• Cardinal: 21009630 can be written as Twenty-one million, nine thousand, six hundred thirty.

Scientific notation

• Scientific notation: 2.100963 × 10⁷

Factors of 21009630

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 130

Divisors of 21009630

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 10 15 19 29 30 31 38 41 57 58 62 82 87 93 95 114 123 145 155 174 186 190 205 246 285 290 310 410 435 465 551 570 589 615 779 870 899 930 1102 1178 1189 1230 1271 1558 1653 1767 1798 2337 2378 2542 2697 2755 2945 3306 3534 3567 3813 3895 4495 4674 5394 5510 5890 5945 6355 7134 7626 7790 8265 8835 8990 11685 11890 12710 13485 16530 17081 17670 17835 19065 22591 23370 24149 26970 34162 35670 36859 38130 45182 48298 51243 67773 72447 73718 85405 102486 110577 112955 120745 135546 144894 170810 184295 221154 225910 241490 256215 338865 362235 368590 512430 552885 677730 700321 724470 1105770 1400642 2100963 3501605 4201926 7003210 10504815 21009630
• Sum of all divisors σ(n): 58060800
• Sum of proper divisors (its aliquot sum) s(n): 37051170
• 21009630 is an abundant number, because the sum of its proper divisors (37051170) is greater than itself. Its abundance is 16041540

Bases of 21009630

• Binary: 1010000001001010011011110₂
• Hexadecimal: 0x14094DE
• Base-36: CIB4U

Squares and roots of 21009630

• 21009630 squared (21009630²) is 441404552736900
• 21009630 cubed (21009630³) is 9273746333317756347000
• The square root of 21009630 is 4583.6262936675
• The cube root of 21009630 is 275.9345833201

Scales and comparisons

• 21,009,630 seconds is equal to 34 weeks, 5 days, 4 hours, 30 seconds.
• To count from 1 to 21,009,630 would take you about eighteen 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 21009630 cubic inches would be around 23 feet tall.

Recreational maths with 21009630

• 21009630 backwards is 03690012
• The number of decimal digits it has is: 8
• The sum of 21009630's digits is 21
• More coming soon!