21319680

Names of 21319680

• Cardinal: 21319680 can be written as Twenty-one million, three hundred nineteen thousand, six hundred eighty.

Scientific notation

• Scientific notation: 2.131968 × 10⁷

Factors of 21319680

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 357

Divisors of 21319680

• Number of divisors d(n): 104
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 80 96 120 128 160 192 240 256 320 347 384 480 512 640 694 768 960 1024 1041 1280 1388 1536 1735 1920 2048 2082 2560 2776 3072 3470 3840 4096 4164 5120 5205 5552 6144 6940 7680 8328 10240 10410 11104 12288 13880 15360 16656 20480 20820 22208 27760 30720 33312 41640 44416 55520 61440 66624 83280 88832 111040 133248 166560 177664 222080 266496 333120 355328 444160 532992 666240 710656 888320 1065984 1332480 1421312 1776640 2131968 2664960 3553280 4263936 5329920 7106560 10659840 21319680
• Sum of all divisors σ(n): 68411232
• Sum of proper divisors (its aliquot sum) s(n): 47091552
• 21319680 is an abundant number, because the sum of its proper divisors (47091552) is greater than itself. Its abundance is 25771872

Bases of 21319680

• Binary: 1010001010101000000000000₂
• Hexadecimal: 0x1455000
• Base-36: COYDC

Squares and roots of 21319680

• 21319680 squared (21319680²) is 454528755302400
• 21319680 cubed (21319680³) is 9690407613845471232000
• The square root of 21319680 is 4617.3239002695
• The cube root of 21319680 is 277.2853302847

Scales and comparisons

• 21,319,680 seconds is equal to 35 weeks, 1 day, 18 hours, 8 minutes.
• To count from 1 to 21,319,680 would take you about six days!

  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 21319680 cubic inches would be around 23.1 feet tall.

Recreational maths with 21319680

• 21319680 backwards is 08691312
• 21319680 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21319680's digits is 30
• More coming soon!