20728188992

Names of 20728188992

• Cardinal: 20728188992 can be written as Twenty billion, seven hundred twenty-eight million, one hundred eighty-eight thousand, nine hundred ninety-two.

Scientific notation

• Scientific notation: 2.0728188992 × 10¹⁰

Factors of 20728188992

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 368

Divisors of 20728188992

• Number of divisors d(n): 56
• Complete list of divisors:
  1 2 4 7 8 14 16 28 32 56 64 112 224 359 448 718 1436 2513 2872 5026 5744 10052 11488 20104 22976 40208 80416 128881 160832 257762 515524 902167 1031048 1804334 2062096 3608668 4124192 7217336 8248384 14434672 28869344 46268279 57738688 92536558 185073116 323877953 370146232 647755906 740292464 1295511812 1480584928 2591023624 2961169856 5182047248 10364094496 20728188992
• Sum of all divisors σ(n): 47139880320
• Sum of proper divisors (its aliquot sum) s(n): 26411691328
• 20728188992 is an abundant number, because the sum of its proper divisors (26411691328) is greater than itself. Its abundance is 5683502336

Bases of 20728188992

• Binary: 10011010011011111110001000001000000₂
• Hexadecimal: 0x4D37F1040
• Base-36: 9IT10ZK

Squares and roots of 20728188992

• 20728188992 squared (20728188992²) is 429657818888069976064
• 20728188992 cubed (20728188992³) is 8906028471802421757975508287488
• The square root of 20728188992 is 143972.8758898703
• The cube root of 20728188992 is 2746.9691784611

Scales and comparisons

• 20,728,188,992 seconds is equal to 659 years, 4 weeks, 5 days, 14 hours, 16 minutes, 32 seconds.
• To count from 1 to 20,728,188,992 would take you about one thousand, three hundred eighteen 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 20728188992 cubic inches would be around 228.9 feet tall.

Recreational maths with 20728188992

• 20728188992 backwards is 29988182702
• 20728188992 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 20728188992's digits is 56
• More coming soon!