20389972728

Names of 20389972728

• Cardinal: 20389972728 can be written as Twenty billion, three hundred eighty-nine million, nine hundred seventy-two thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.0389972728 × 10¹⁰

Factors of 20389972728

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 9325

Divisors of 20389972728

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 6 8 12 24 37 41 61 74 82 111 122 123 148 164 183 222 244 246 296 328 366 444 488 492 732 888 984 1464 1517 2257 2501 3034 4514 4551 5002 6068 6771 7503 9028 9102 9181 10004 12136 13542 15006 18056 18204 18362 20008 27084 27543 30012 36408 36724 54168 55086 60024 73448 92537 110172 185074 220344 277611 339697 370148 376421 555222 560041 679394 740296 752842 1019091 1110444 1120082 1129263 1358788 1505684 1680123 2038182 2220888 2240164 2258526 2717576 3011368 3360246 4076364 4480328 4517052 6720492 8152728 9034104 13440984 13927577 20721517 22961681 27855154 41443034 41782731 45923362 55710308 62164551 68885043 82886068 83565462 91846724 111420616 124329102 137770086 165772136 167130924 183693448 248658204 275540172 334261848 497316408 551080344 849582197 1699164394 2548746591 3398328788 5097493182 6796657576 10194986364 20389972728
• Sum of all divisors σ(n): 54514635840
• Sum of proper divisors (its aliquot sum) s(n): 34124663112
• 20389972728 is an abundant number, because the sum of its proper divisors (34124663112) is greater than itself. Its abundance is 13734690384

Bases of 20389972728

• Binary: 10010111111010101100100101011111000₂
• Hexadecimal: 0x4BF564AF8
• Base-36: 9D7NVNC

Squares and roots of 20389972728

• 20389972728 squared (20389972728²) is 415750987848583761984
• 20389972728 cubed (20389972728³) is 8477151303871682300277403172352
• The square root of 20389972728 is 142793.4617830943
• The cube root of 20389972728 is 2731.9466554355

Scales and comparisons

• 20,389,972,728 seconds is equal to 648 years, 17 weeks, 4 days, 1 hour, 18 minutes, 48 seconds.
• To count from 1 to 20,389,972,728 would take you about one thousand, two hundred ninety-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 20389972728 cubic inches would be around 227.7 feet tall.

Recreational maths with 20389972728

• 20389972728 backwards is 82727998302
• The number of decimal digits it has is: 11
• The sum of 20389972728's digits is 57
• More coming soon!