What is 20k means?

20,000 (twenty thousand) is the natural number that comes after 19,999 and before 20,001.

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Natural number

20,000 (twenty thousand) is the natural number that comes after 19,999 and before 20,001. 20,000 is a round number, and is also in the title of Jules Verne's novel Twenty Thousand Leagues Under the Sea.

Selected numbers in the range 20001–29999 [ edit ]

20001 to 20999 [ edit ]

21000 to 21999 [ edit ]

22000 to 22999 [ edit ]

23000 to 23999 [ edit ]

23000 = number of primes ≤ 2 18 {displaystyle leq 2^{18}} [13]

= number of primes 23401 = Leyland number: [4] 6 5 + 5 6 = Leyland number: 6 + 5 23409 = 153 2 , sum of the cubes of the first 17 positive integers = 153 , sum of the cubes of the first 17 positive integers 23497 = cuban prime [11]

= cuban prime 23821 = square pyramidal number [5]

= square pyramidal number 23833 = Padovan prime

= Padovan prime 23969 = octahedral number [9]

= octahedral number 23976 = pentagonal pyramidal number[3]

24000 to 24999 [ edit ]

25000 to 25999 [ edit ]

25011 = the smallest composite number, ending in 1, 3, 7, or 9, that in base 10 remains composite after any insertion of a digit = the smallest composite number, ending in 1, 3, 7, or 9, that in base 10 remains composite after any insertion of a digit 25085 = Zeisel number [14]

= Zeisel number 25117 = cuban prime [11]

= cuban prime 25200 = highly composite number [2]

= highly composite number 25205 = largest number whose factorial is less than 10 100000 = largest number whose factorial is less than 10 25585 = square pyramidal number [5]

= square pyramidal number 25724 = Fine number[16]

26000 to 26999 [ edit ]

26214 = octahedral number [9]

= octahedral number 26227 = cuban prime [11]

= cuban prime 26861 = smallest number for which there are more primes of the form 4 k + 1 than of the form 4 k + 3 up to the number, against Chebyshev's bias = smallest number for which there are more primes of the form 4 + 1 than of the form 4 + 3 up to the number, against Chebyshev's bias 26896 = 1642, palindromic in base 9: 40804 9

27000 to 27999 [ edit ]

27000 = 30 3

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= 30 27434 = square pyramidal number [5]

= square pyramidal number 27559 = Zeisel number [14]

= Zeisel number 27648 = 1 1 × 2 2 × 3 3 × 4 4

= 1 × 2 × 3 × 4 27653 = Friedman prime

= Friedman prime 27720 = highly composite number; [2] smallest number divisible by the numbers 1 to 12 (there is no smaller number divisible by the numbers 1 to 11) = highly composite number; smallest number divisible by the numbers 1 to 12 (there is no smaller number divisible by the numbers 1 to 11) 27846 = harmonic divisor number [17]

= harmonic divisor number 27889 = 1672

28000 to 28999 [ edit ]

28158 = pentagonal pyramidal number [3]

= pentagonal pyramidal number 28374 = smallest integer to start a run of six consecutive integers with the same number of divisors = smallest integer to start a run of six consecutive integers with the same number of divisors 28393 = unique prime in base 13

= unique prime in base 13 28547 = Friedman prime

= Friedman prime 28559 = nice Friedman prime

= nice Friedman prime 28561 = 169 2 = 13 4 = 119 2 + 120 2 , number that is simultaneously a square number and a centered square number, palindromic in base 12: 14641 12 = 169 = 13 = 119 + 120 , number that is simultaneously a square number and a centered square number, palindromic in base 12: 14641 28595 = octahedral number [9]

= octahedral number 28657 = Fibonacci prime, [18] Markov prime [19]

= Fibonacci prime, Markov prime 28900 = 1702, palindromic in base 13: 10201 13

29000 to 29999 [ edit ]

29241 = 171 2 , sum of the cubes of the first 18 positive integers = 171 , sum of the cubes of the first 18 positive integers 29341 = Carmichael number [20]