21171424640

Names of 21171424640

• Cardinal: 21171424640 can be written as Twenty-one billion, one hundred seventy-one million, four hundred twenty-four thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.117142464 × 10¹⁰

Factors of 21171424640

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1945927

Divisors of 21171424640

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 5 8 10 16 17 20 32 34 40 64 68 80 85 128 136 160 170 272 320 340 544 640 680 1088 1360 2176 2720 5440 10880 1945903 3891806 7783612 9729515 15567224 19459030 31134448 33080351 38918060 62268896 66160702 77836120 124537792 132321404 155672240 165401755 249075584 264642808 311344480 330803510 529285616 622688960 661607020 1058571232 1245377920 1323214040 2117142464 2646428080 4234284928 5292856160 10585712320 21171424640
• Sum of all divisors σ(n): 53590196160
• Sum of proper divisors (its aliquot sum) s(n): 32418771520
• 21171424640 is an abundant number, because the sum of its proper divisors (32418771520) is greater than itself. Its abundance is 11247346880

Bases of 21171424640

• Binary: 10011101101111010100100110110000000₂
• Hexadecimal: 0x4EDEA4D80
• Base-36: 9Q4X3SW

Squares and roots of 21171424640

• 21171424640 squared (21171424640²) is 448229221287199129600
• 21171424640 cubed (21171424640³) is 9489651179927820168999993344000
• The square root of 21171424640 is 145504.0365075829
• The cube root of 21171424640 is 2766.4109459943

Scales and comparisons

• 21,171,424,640 seconds is equal to 673 years, 9 weeks, 4 days, 15 hours, 17 minutes, 20 seconds.
• To count from 1 to 21,171,424,640 would take you about one thousand, three hundred forty-six years!

  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 21171424640 cubic inches would be around 230.5 feet tall.

Recreational maths with 21171424640

• 21171424640 backwards is 04642417112
• 21171424640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21171424640's digits is 32
• More coming soon!