21078406400

Names of 21078406400

• Cardinal: 21078406400 can be written as Twenty-one billion, seventy-eight million, four hundred six thousand, four hundred.

Scientific notation

• Scientific notation: 2.10784064 × 10¹⁰

Factors of 21078406400

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 373

Divisors of 21078406400

• Number of divisors d(n): 162
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 29 32 40 50 58 64 80 100 116 128 145 160 200 232 256 290 320 337 400 464 580 640 674 725 800 928 1160 1280 1348 1450 1600 1685 1856 2320 2696 2900 3200 3370 3712 4640 5392 5800 6400 6740 7424 8425 9280 9773 10784 11600 13480 16850 18560 19546 21568 23200 26960 33700 37120 39092 43136 46400 48865 53920 67400 78184 86272 92800 97730 107840 113569 134800 156368 185600 195460 215680 227138 244325 269600 312736 390920 431360 454276 488650 539200 567845 625472 781840 908552 977300 1078400 1135690 1250944 1563680 1817104 1954600 2156800 2271380 2501888 2839225 3127360 3293501 3634208 3909200 4542760 5678450 6254720 6587002 7268416 7818400 9085520 11356900 12509440 13174004 14536832 15636800 16467505 18171040 22713800 26348008 29073664 31273600 32935010 36342080 45427600 52696016 62547200 65870020 72684160 82337525 90855200 105392032 131740040 145368320 164675050 181710400 210784064 263480080 329350100 363420800 421568128 526960160 658700200 726841600 843136256 1053920320 1317400400 2107840640 2634800800 4215681280 5269601600 10539203200 21078406400
• Sum of all divisors σ(n): 54132023610
• Sum of proper divisors (its aliquot sum) s(n): 33053617210
• 21078406400 is an abundant number, because the sum of its proper divisors (33053617210) is greater than itself. Its abundance is 11975210810

Bases of 21078406400

• Binary: 10011101000010111101111010100000000₂
• Hexadecimal: 0x4E85EF500
• Base-36: 9OLJEGW

Squares and roots of 21078406400

• 21078406400 squared (21078406400²) is 444299216363560960000
• 21078406400 cubed (21078406400³) is 9365119445712668066054144000000
• The square root of 21078406400 is 145184.0432003463
• The cube root of 21078406400 is 2762.3535200751

Scales and comparisons

• 21,078,406,400 seconds is equal to 670 years, 11 weeks, 6 days, 53 minutes, 20 seconds.
• To count from 1 to 21,078,406,400 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 21078406400 cubic inches would be around 230.2 feet tall.

Recreational maths with 21078406400

• 21078406400 backwards is 00460487012
• 21078406400 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21078406400's digits is 32
• More coming soon!