Properties of the Number 20954

Twenty Thousand Nine Hundred Fifty-Four

Basics

Value: 20953 → 20954 → 20955

Parity: even

Prime: No

Previous Prime: 20947

Next Prime: 20959

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 10477

Divisors: 1, 2, 10477, 20954

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000111011010

Octal: 50732

Duodecimal: 10162

Hexadecimal: 51da

Square: 439070116

Square Root: 144.75496537252184

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 positive solutions to (x₁)² + (x₂)² + (x₃)² + (x₄)² <= n². A341423

Where records occur in A144294. A144295

Numbers k such that the continued fraction for sqrt(k) has period 53. A20392

Molecular topological indices of the path graphs P_n. A121318

Expansion of q^-1/4 * (η(q) * η(q⁴)² / η(q²)³)² in powers of q. A79006

Expansion of k/(4·q^1/2) in powers of q, where k defined by sqrt(k) = theta₂(0, q)/theta₃(0, q). A1938

Coefficients of expansion of Jacobi nome q in certain powers of (1/2)*(1 - sqrt(k')) / (1 + sqrt(k')). A2103

q = x·exp( 8 * (∑_k>0 a(k) * x^k / k)) where x = m/16, q is the elliptic nome and m = k² is the parameter. A227503

Numerators of coefficients of zⁿ/n! for the expansion of Fricke's hypergeometric function F₁(1/2,1/2;z). A274653

Expansion of Auxiliary function L(1-m) / 4 in powers of m / 16. A78791