Properties of the Number 18080

Eighteen Thousand Eighty

Basics

Value: 18079 → 18080 → 18081

Parity: even

Prime: No

Previous Prime: 18077

Next Prime: 18089

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ⁵ × 5 × 113

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011010100000

Octal: 43240

Duodecimal: A568

Hexadecimal: 46a0

Square: 326886400

Square Root: 134.46189051177288

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

Generalized Catalan Numbers x³*A(x)² + (x-1)*A(x) + 1 =0. A23431

a(n) = ∑_k=1..n lcm(n,k). A51193

Triangle read by rows: T(n,k) is the number of unoriented colorings of the facets of a regular n-dimensional orthotope using exactly k colors. Row n has 2n columns. A325009

a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, 0, 1, 1. A25246

The sixth moments of the squared binomial coefficients; a(n) = ∑_m=0..n m⁶*binomial(n, m)². A329444

First of triples of consecutive happy numbers, i.e., the first of three consecutive integers each of which is a happy number (A007770). A72494

a(0) = 1; a(n) = ∑_{k=0..floor((n-1)/2)} binomial(n-k,k) * a(n-2·k-1). A352864

a(n) in base 15 is a repdigit. A48339

Expansion of 1/(1 - 2·x³ - x⁴). A52922

a(n) = ceiling(a(n-1)/(2^1/3-1)+1), a(1)=1. A303647