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Properties of the Number 18441

Eighteen Thousand Four Hundred Forty-One

Basics

Value: 18440 → 18441 → 18442

Parity: odd

Prime: No

Previous Prime: 18439

Next Prime: 18443

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 3 × 683

Divisors: 1, 3, 9, 27, 683, 2049, 6147, 18441

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100000001001

Octal: 44011

Duodecimal: A809

Hexadecimal: 4809

Square: 340070481

Square Root: 135.7976435730753

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·such that the sum of all their cyclic permutations is equal to that of all cyclic permutations of σ(x) and all cyclic permutations of Euler totient function φ(x). A247317
Sum of terms in 'rows' of A178746. A178747
Numbers n not divisible by 2 such that n2 written in base 4 has no digit > 1. A257284
The icosagen sequence : a(n) = A018227(n)-5, for n >= 2. A271997
a(n) = (A216363(n) - 1)/118. A216380
Number of length n+3 0..2 arrays with some disjoint pairs in every consecutive four terms having the same sum. A247527
Number of n X 3 binary arrays with rows and columns lexicographically nondecreasing and row and column sums nondecreasing. A266357
a(n) = 36·2n + 9. A305154
Engel expansion for ii = exp(-π/2). A83283
Divisors of 414. A18441