20381220

Names of 20381220

• Cardinal: 20381220 can be written as Twenty million, three hundred eighty-one thousand, two hundred twenty.

Scientific notation

• Scientific notation: 2.038122 × 10⁷

Factors of 20381220

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 580

Divisors of 20381220

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 23 27 30 36 45 46 54 60 69 81 90 92 108 115 135 138 162 180 207 230 270 276 324 345 405 414 460 540 547 621 690 810 828 1035 1094 1242 1380 1620 1641 1863 2070 2188 2484 2735 3105 3282 3726 4140 4923 5470 6210 6564 7452 8205 9315 9846 10940 12420 12581 14769 16410 18630 19692 24615 25162 29538 32820 37260 37743 44307 49230 50324 59076 62905 73845 75486 88614 98460 113229 125810 147690 150972 177228 188715 221535 226458 251620 295380 339687 377430 443070 452916 566145 679374 754860 886140 1019061 1132290 1358748 1698435 2038122 2264580 3396870 4076244 5095305 6793740 10190610 20381220
• Sum of all divisors σ(n): 66838464
• Sum of proper divisors (its aliquot sum) s(n): 46457244
• 20381220 is an abundant number, because the sum of its proper divisors (46457244) is greater than itself. Its abundance is 26076024

Bases of 20381220

• Binary: 1001101101111111000100100₂
• Hexadecimal: 0x136FE24
• Base-36: C4U90

Squares and roots of 20381220

• 20381220 squared (20381220²) is 415394128688400
• 20381220 cubed (20381220³) is 8466239123506591848000
• The square root of 20381220 is 4514.5564566189
• The cube root of 20381220 is 273.1555688617

Scales and comparisons

• 20,381,220 seconds is equal to 33 weeks, 4 days, 21 hours, 27 minutes.
• To count from 1 to 20,381,220 would take you about fifty weeks!

  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 20381220 cubic inches would be around 22.8 feet tall.

Recreational maths with 20381220

• 20381220 backwards is 02218302
• 20381220 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20381220's digits is 18
• More coming soon!