Properties of the Number 20519

Twenty Thousand Five Hundred Nineteen

Basics

Value: 20518 → 20519 → 20520

Parity: odd

Prime: No

Previous Prime: 20509

Next Prime: 20521

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 17 ² × 71

Divisors: 1, 17, 71, 289, 1207, 20519

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000000100111

Octal: 50047

Duodecimal: BA5B

Hexadecimal: 5027

Square: 421029361

Square Root: 143.2445461439981

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) = |1³ - 2³ + 3³ - 4³ + ... + (-1)ⁿ⁺¹*n³|. A11934

Alternating sum of cubes, i.e., ∑_k=0..n k^p*q^k for p=3, q=-1. A232599

Number of chiral pairs of multidimensional n-ominoes with cell centers determining n-3 space. A355054

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 398", based on the 5-celled von Neumann neighborhood. A281759

Denominators of continued fraction convergents to sqrt(758). A42461

Number of unordered factorizations of n! into two distinct proper factors. A157672

Consecutive states of the linear congruential pseudo-random number generator (1021·s + 25673) mod 121500 when started at s=1. A385341

Number of zero-sum -n..n arrays of 6 elements with first through third differences also in -n..n. A202514

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 97", based on the 5-celled von Neumann neighborhood. A270154

T(n,k)=Number of zero-sum -k..k arrays of n elements with first through third differences also in -k..k. A202511