Properties of the Number 18473

Eighteen Thousand Four Hundred Seventy-Three

Basics

Value: 18472 → 18473 → 18474

Parity: odd

Prime: No

Previous Prime: 18461

Next Prime: 18481

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 7 ² × 13 × 29

Divisors: 1, 7, 13, 29, 49, 91, 203, 377, 637, 1421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100000101001

Octal: 44051

Duodecimal: A835

Hexadecimal: 4829

Square: 341251729

Square Root: 135.9154148726332

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 steps to go from (n+1)!-1 to n!-1 with map x -> x - (sum of digits in factorial base representation of x). A219661

-7-Knödel numbers. A225511

Piet Hut's "coat-hanger" sequence: unlabeled forests of rooted trees with n edges, where there can be any number of components, the outdegree of each node is <= 2 and the symmetric group acts on the components. A88325

Numbers m such that A137671(m) = 1. A137674

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 579", based on the 5-celled von Neumann neighborhood. A283089

a(n) = C(3+n, n) + C(4+n, n) + C(5+n, n) + C(6+n, n). A62966

Bisection of A000125. A100503

Numbers for which the root mean square of nontrivial divisors is an integer and which are not a square of prime numbers. A247137

Terms of A349937 that are not divisible by 3: numbers k > 1 not divisible by 2 or 3 such that A309906(k-1) < A309906(k) > A309906(k+1). A349941

a(n) = binomial(n,4) - binomial(floor(n/2),4) - binomial(ceiling(n/2),4). A111385