21003430

Names of 21003430

• Cardinal: 21003430 can be written as Twenty-one million, three thousand, four hundred thirty.

Scientific notation

• Scientific notation: 2.100343 × 10⁷

Factors of 21003430

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 9724

Divisors of 21003430

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 5 7 10 14 31 35 62 70 155 217 310 434 1085 2170 9679 19358 48395 67753 96790 135506 300049 338765 600098 677530 1500245 2100343 3000490 4200686 10501715 21003430
• Sum of all divisors σ(n): 44605440
• Sum of proper divisors (its aliquot sum) s(n): 23602010
• 21003430 is an abundant number, because the sum of its proper divisors (23602010) is greater than itself. Its abundance is 2598580

Bases of 21003430

• Binary: 1010000000111110010100110₂
• Hexadecimal: 0x1407CA6
• Base-36: CI6CM

Squares and roots of 21003430

• 21003430 squared (21003430²) is 441144071764900
• 21003430 cubed (21003430³) is 9265538631229053607000
• The square root of 21003430 is 4582.9499233573
• The cube root of 21003430 is 275.9074376295

Scales and comparisons

• 21,003,430 seconds is equal to 34 weeks, 5 days, 2 hours, 17 minutes, 10 seconds.
• To count from 1 to 21,003,430 would take you about fifteen 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 21003430 cubic inches would be around 23 feet tall.

Recreational maths with 21003430

• 21003430 backwards is 03430012
• The number of decimal digits it has is: 8
• The sum of 21003430's digits is 13
• More coming soon!