Properties of the Number 20398

Twenty Thousand Three Hundred Ninety-Eight

Basics

Value: 20397 → 20398 → 20399

Parity: even

Prime: No

Previous Prime: 20393

Next Prime: 20399

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 7 × 31 × 47

Divisors: 1, 2, 7, 14, 31, 47, 62, 94, 217, 329

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111110101110

Octal: 47656

Duodecimal: B97A

Hexadecimal: 4fae

Square: 416078404

Square Root: 142.8215669988255

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

Number of basis partitions (or basic partitions) of n. A66447

Expansion of (ψ(x) * φ(-x)⁴)² in powers of·where φ(), ψ() are Ramanujan θ functions. A215472

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise. A235413

a(n) = (n-dimensional partitions of 6) + C(n,4) + C(n,3). A8780

Expansion of (ψ(-x) * φ(x)⁴)² in powers of·where φ(), ψ() are Ramanujan θ functions. A209942

Number of partitions of n with product of multiplicities of parts equal to n. A266499

Number of binary words of length n with exactly one occurrence of subword 010 and exactly two occurrences of subword 101. A260505

Numbers k for which rank of the elliptic curve y²=x³+k·x is 4. A309031

Consecutive states of the linear congruential pseudo-random number generator (625·s + 6571) mod 31104 when started at s=1. A385279

Expansion of f(-q)² * Q(q) in powers of q. A122266