21438344947840

Names of 21438344947840

• Cardinal: 21438344947840 can be written as Twenty-one trillion, four hundred thirty-eight billion, three hundred forty-four million, nine hundred forty-seven thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.143834494784 × 10¹³

Factors of 21438344947840

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 905335557

Divisors of 21438344947840

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 37 40 64 74 80 128 148 160 185 296 320 370 592 640 740 1184 1480 2368 2960 4736 5920 11840 23680 905335513 1810671026 3621342052 4526677565 7242684104 9053355130 14485368208 18106710260 28970736416 33497413981 36213420520 57941472832 66994827962 72426841040 115882945664 133989655924 144853682080 167487069905 267979311848 289707364160 334974139810 535958623696 579414728320 669948279620 1071917247392 1339896559240 2143834494784 2679793118480 4287668989568 5359586236960 10719172473920 21438344947840
• Sum of all divisors σ(n): 52636206783960
• Sum of proper divisors (its aliquot sum) s(n): 31197861836120
• 21438344947840 is an abundant number, because the sum of its proper divisors (31197861836120) is greater than itself. Its abundance is 9759516888280

Bases of 21438344947840

• Binary: 100110111111110000000111011110110100010000000₂
• Hexadecimal: 0x137F80EF6880
• Base-36: 7LKN1264G

Squares and roots of 21438344947840

• 21438344947840 squared (21438344947840²) is 459602634102576852320665600
• 21438344947840 cubed (21438344947840³) is 9853119808826934554274071145386082304000
• The square root of 21438344947840 is 4630156.0392539687
• The cube root of 21438344947840 is 27779.8833763737

Scales and comparisons

• 21,438,344,947,840 seconds is equal to 681,673 years, 2 weeks, 6 days, 10 hours, 50 minutes, 40 seconds.
• To count from 1 to 21,438,344,947,840 would take you about one million, seven hundred four thousand, one hundred eighty-two 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 21438344947840 cubic inches would be around 2315 feet tall.

Recreational maths with 21438344947840

• 21438344947840 backwards is 04874944383412
• The number of decimal digits it has is: 14
• The sum of 21438344947840's digits is 61
• More coming soon!