21371947

Names of 21371947

• Cardinal: 21371947 can be written as Twenty-one million, three hundred seventy-one thousand, nine hundred forty-seven.

Scientific notation

• Scientific notation: 2.1371947 × 10⁷

Factors of 21371947

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 521308

Divisors of 21371947

• Number of divisors d(n): 4
• Complete list of divisors:
  1 41 521267 21371947
• Sum of all divisors σ(n): 21893256
• Sum of proper divisors (its aliquot sum) s(n): 521309
• 21371947 is a deficient number, because the sum of its proper divisors (521309) is less than itself. Its deficiency is 20850638

Bases of 21371947

• Binary: 1010001100001110000101011₂
• Hexadecimal: 0x1461C2B
• Base-36: CQ2P7

Squares and roots of 21371947

• 21371947 squared (21371947²) is 456760118570809
• 21371947 cubed (21371947³) is 9761853045809045695123
• The square root of 21371947 is 4622.9803157703
• The cube root of 21371947 is 277.5117415155

Scales and comparisons

• 21,371,947 seconds is equal to 35 weeks, 2 days, 8 hours, 39 minutes, 7 seconds.
• To count from 1 to 21,371,947 would take you about fifty-eight minutes!

  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 21371947 cubic inches would be around 23.1 feet tall.

Recreational maths with 21371947

• 21371947 backwards is 74917312
• The number of decimal digits it has is: 8
• The sum of 21371947's digits is 34
• More coming soon!