Properties of the Number 20994

Twenty Thousand Nine Hundred Ninety-Four

Basics

Value: 20993 → 20994 → 20995

Parity: even

Prime: No

Previous Prime: 20983

Next Prime: 21001

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 3499

Divisors: 1, 2, 3, 6, 3499, 6998, 10497, 20994

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001000000010

Octal: 51002

Duodecimal: 10196

Hexadecimal: 5202

Square: 440748036

Square Root: 144.89306401619092

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

Numbers k such that 2^k - 11 is prime. A96817

Expansion of ψ(x⁶) / ψ(-x) in powers of·where ψ() is a Ramanujan θ function. A132217

Expansion of ψ(x³)³ * ψ(x²) / ψ(x)⁴ in powers of·where ψ() is a Ramanujan θ function. A262158

a(n) = 108·n² - 228·n + 114 (n>=2). A304618

Number of graphs with n nodes, n-1 edges and no isolated vertices. A6648

1-sequence of reduction of the lower Wythoff sequence by x² -> x+1. A192301

Expansion of f(-x, -x⁵) * f(x, x⁷) / f(-x, -x²)² in powers of·where f(, ) is Ramanujan's general θ function. A262146

Primes that are both left-truncatable and right-truncatable. A20994