21012530

Names of 21012530

• Cardinal: 21012530 can be written as Twenty-one million, twelve thousand, five hundred thirty.

Scientific notation

• Scientific notation: 2.101253 × 10⁷

Factors of 21012530

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 995

Divisors of 21012530

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 5 7 10 11 14 22 29 35 55 58 70 77 110 145 154 203 290 319 385 406 638 770 941 1015 1595 1882 2030 2233 3190 4466 4705 6587 9410 10351 11165 13174 20702 22330 27289 32935 51755 54578 65870 72457 103510 136445 144914 191023 272890 300179 362285 382046 600358 724570 955115 1500895 1910230 2101253 3001790 4202506 10506265 21012530
• Sum of all divisors σ(n): 48833280
• Sum of proper divisors (its aliquot sum) s(n): 27820750
• 21012530 is an abundant number, because the sum of its proper divisors (27820750) is greater than itself. Its abundance is 6808220

Bases of 21012530

• Binary: 1010000001010000000110010₂
• Hexadecimal: 0x140A032
• Base-36: CIDDE

Squares and roots of 21012530

• 21012530 squared (21012530²) is 441526417000900
• 21012530 cubed (21012530³) is 9277587083023921277000
• The square root of 21012530 is 4583.9426261681
• The cube root of 21012530 is 275.9472786647

Scales and comparisons

• 21,012,530 seconds is equal to 34 weeks, 5 days, 4 hours, 48 minutes, 50 seconds.
• To count from 1 to 21,012,530 would take you about nineteen 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 21012530 cubic inches would be around 23 feet tall.

Recreational maths with 21012530

• 21012530 backwards is 03521012
• 21012530 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21012530's digits is 14
• More coming soon!