21150990

Names of 21150990

• Cardinal: 21150990 can be written as Twenty-one million, one hundred fifty thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 2.115099 × 10⁷

Factors of 21150990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 67

Divisors of 21150990

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 19 21 27 30 31 35 38 42 45 54 57 62 63 70 90 93 95 105 114 126 133 135 155 171 186 189 190 210 217 266 270 279 285 310 315 342 361 378 399 434 465 513 558 570 589 630 651 665 722 798 837 855 930 945 1026 1083 1085 1178 1197 1302 1330 1395 1674 1710 1767 1805 1890 1953 1995 2166 2170 2394 2527 2565 2790 2945 3249 3255 3534 3591 3610 3906 3990 4123 4185 5054 5130 5301 5415 5859 5890 5985 6498 6510 7182 7581 8246 8370 8835 9747 9765 10602 10830 11191 11718 11970 12369 12635 15162 15903 16245 17670 17955 19494 19530 20615 22382 22743 24738 25270 26505 29295 31806 32490 33573 35910 37107 37905 41230 45486 48735 53010 55955 58590 61845 67146 68229 74214 75810 78337 79515 97470 100719 111321 111910 113715 123690 136458 156674 159030 167865 185535 201438 222642 227430 235011 302157 335730 341145 371070 391685 470022 503595 556605 604314 682290 705033 783370 1007190 1113210 1175055 1410066 1510785 2115099 2350110 3021570 3525165 4230198 7050330 10575495 21150990
• Sum of all divisors σ(n): 70225920
• Sum of proper divisors (its aliquot sum) s(n): 49074930
• 21150990 is an abundant number, because the sum of its proper divisors (49074930) is greater than itself. Its abundance is 27923940

Bases of 21150990

• Binary: 1010000101011110100001110₂
• Hexadecimal: 0x142BD0E
• Base-36: CLC7I

Squares and roots of 21150990

• 21150990 squared (21150990²) is 447364377980100
• 21150990 cubed (21150990³) is 9462199485013315299000
• The square root of 21150990 is 4599.0205478993
• The cube root of 21150990 is 276.5520613699

Scales and comparisons

• 21,150,990 seconds is equal to 34 weeks, 6 days, 19 hours, 16 minutes, 30 seconds.
• To count from 1 to 21,150,990 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 21150990 cubic inches would be around 23 feet tall.

Recreational maths with 21150990

• 21150990 backwards is 09905112
• 21150990 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21150990's digits is 27
• More coming soon!