20421450

Names of 20421450

• Cardinal: 20421450 can be written as Twenty million, four hundred twenty-one thousand, four hundred fifty.

Scientific notation

• Scientific notation: 2.042145 × 10⁷

Factors of 20421450

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 2178

Divisors of 20421450

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 21 25 27 30 35 42 45 50 54 63 70 75 90 105 126 135 150 175 189 210 225 270 315 350 378 450 525 630 675 945 1050 1350 1575 1890 2161 3150 4322 4725 6483 9450 10805 12966 15127 19449 21610 30254 32415 38898 45381 54025 58347 64830 75635 90762 97245 108050 116694 136143 151270 162075 194490 226905 272286 291735 324150 378175 408429 453810 486225 583470 680715 756350 816858 972450 1134525 1361430 1458675 2042145 2269050 2917350 3403575 4084290 6807150 10210725 20421450
• Sum of all divisors σ(n): 64341120
• Sum of proper divisors (its aliquot sum) s(n): 43919670
• 20421450 is an abundant number, because the sum of its proper divisors (43919670) is greater than itself. Its abundance is 23498220

Bases of 20421450

• Binary: 1001101111001101101001010₂
• Hexadecimal: 0x1379B4A
• Base-36: C5PAI

Squares and roots of 20421450

• 20421450 squared (20421450²) is 417035620102500
• 20421450 cubed (20421450³) is 8516472064142198625000
• The square root of 20421450 is 4519.0098473007
• The cube root of 20421450 is 273.3351758089

Scales and comparisons

• 20,421,450 seconds is equal to 33 weeks, 5 days, 8 hours, 37 minutes, 30 seconds.
• To count from 1 to 20,421,450 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 20421450 cubic inches would be around 22.8 feet tall.

Recreational maths with 20421450

• 20421450 backwards is 05412402
• 20421450 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20421450's digits is 18
• More coming soon!