20921400

Names of 20921400

• Cardinal: 20921400 can be written as Twenty million, nine hundred twenty-one thousand, four hundred.

Scientific notation

• Scientific notation: 2.09214 × 10⁷

Factors of 20921400

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 266

Divisors of 20921400

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 25 30 36 40 45 50 59 60 72 75 90 100 118 120 150 177 180 197 200 225 236 295 300 354 360 394 450 472 531 590 591 600 708 788 885 900 985 1062 1180 1182 1416 1475 1576 1770 1773 1800 1970 2124 2360 2364 2655 2950 2955 3540 3546 3940 4248 4425 4728 4925 5310 5900 5910 7080 7092 7880 8850 8865 9850 10620 11623 11800 11820 13275 14184 14775 17700 17730 19700 21240 23246 23640 26550 29550 34869 35400 35460 39400 44325 46492 53100 58115 59100 69738 70920 88650 92984 104607 106200 116230 118200 139476 174345 177300 209214 232460 278952 290575 348690 354600 418428 464920 523035 581150 697380 836856 871725 1046070 1162300 1394760 1743450 2092140 2324600 2615175 3486900 4184280 5230350 6973800 10460700 20921400
• Sum of all divisors σ(n): 71814600
• Sum of proper divisors (its aliquot sum) s(n): 50893200
• 20921400 is an abundant number, because the sum of its proper divisors (50893200) is greater than itself. Its abundance is 29971800

Bases of 20921400

• Binary: 1001111110011110000111000₂
• Hexadecimal: 0x13F3C38
• Base-36: CGF20

Squares and roots of 20921400

• 20921400 squared (20921400²) is 437704977960000
• 20921400 cubed (20921400³) is 9157400925892344000000
• The square root of 20921400 is 4573.9916921657
• The cube root of 20921400 is 275.5477786663

Scales and comparisons

• 20,921,400 seconds is equal to 34 weeks, 4 days, 3 hours, 30 minutes.
• To count from 1 to 20,921,400 would take you about fifty-one 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 20921400 cubic inches would be around 23 feet tall.

Recreational maths with 20921400

• 20921400 backwards is 00412902
• 20921400 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20921400's digits is 18
• More coming soon!