Properties of the Number 18982

Eighteen Thousand Nine Hundred Eighty-Two

Basics

Value: 18981 → 18982 → 18983

Parity: even

Prime: No

Previous Prime: 18979

Next Prime: 19001

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 9491

Divisors: 1, 2, 9491, 18982

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 100101000100110

Octal: 45046

Duodecimal: AB9A

Hexadecimal: 4a26

Square: 360316324

Square Root: 137.77517918696387

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) = n³ - 4·n² + 6·n - 2. A188377

a(n) = ∑_{d divides n} (n/d)^2d. A73705

G.f.: ∑_n>=0 (1 + xⁿ)ⁿ * xⁿ / (1-x)ⁿ⁺¹. A243988

The number of monic integer polynomials of degree n all of whose roots are distinct and of modulus at most 1. A280709

Expansion of ∑_i>=1 μ(i)²*xⁱ/(1 - xⁱ) / ∏_j>=1 (1 - x^j), where μ() is the Moebius function (A008683). A281573

Number of not unique partition coefficients of n. A309897

Centered 27-gonal numbers. A389797

First differences are A005563. A47732

Triangle read by rows: T(n,k) is the number of permutations of length n composed of exactly k overlapping adjacent runs (for n >= 1 and 1 <= k <= n). A309993

Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AST = AlPO4-16 [Al20P20O80].4R.16H2O starting with a T1 atom. A18982