21078432128

Names of 21078432128

• Cardinal: 21078432128 can be written as Twenty-one billion, seventy-eight million, four hundred thirty-two thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1078432128 × 10¹⁰

Factors of 21078432128

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 3192

Divisors of 21078432128

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 8 13 16 26 32 43 52 64 86 97 104 128 172 194 208 344 388 416 559 688 776 832 1118 1261 1376 1552 1664 2236 2522 2752 3037 3104 4171 4472 5044 5504 6074 6208 8342 8944 10088 12148 12416 16684 17888 20176 24296 33368 35776 39481 40352 48592 54223 66736 71552 78962 80704 97184 108446 130591 133472 157924 161408 194368 216892 261182 266944 294589 315848 388736 433784 522364 533888 589178 631696 867568 1044728 1178356 1263392 1697683 1735136 2089456 2356712 2526784 3395366 3470272 3829657 4178912 4713424 5053568 6790732 6940544 7659314 8357824 9426848 12667327 13581464 15318628 16715648 18853696 25334654 27162928 30637256 37707392 50669308 54325856 61274512 101338616 108651712 122549024 164675251 202677232 217303424 245098048 329350502 405354464 490196096 658701004 810708928 1317402008 1621417856 2634804016 5269608032 10539216064 21078432128
• Sum of all divisors σ(n): 46766485920
• Sum of proper divisors (its aliquot sum) s(n): 25688053792
• 21078432128 is an abundant number, because the sum of its proper divisors (25688053792) is greater than itself. Its abundance is 4609621664

Bases of 21078432128

• Binary: 10011101000010111110101100110000000₂
• Hexadecimal: 0x4E85F5980
• Base-36: 9OLJYBK

Squares and roots of 21078432128

• 21078432128 squared (21078432128²) is 444300300974702608384
• 21078432128 cubed (21078432128³) is 9365153738545241175806707761152
• The square root of 21078432128 is 145184.1318050977
• The cube root of 21078432128 is 2762.3546439711

Scales and comparisons

• 21,078,432,128 seconds is equal to 670 years, 11 weeks, 6 days, 8 hours, 2 minutes, 8 seconds.
• To count from 1 to 21,078,432,128 would take you about one thousand, three hundred forty 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 21078432128 cubic inches would be around 230.2 feet tall.

Recreational maths with 21078432128

• 21078432128 backwards is 82123487012
• The number of decimal digits it has is: 11
• The sum of 21078432128's digits is 38
• More coming soon!