ℕ atory
Play Now

Properties of the Number 18406

Eighteen Thousand Four Hundred Six

Basics

Value: 18405 → 18406 → 18407

Parity: even

Prime: No

Previous Prime: 18401

Next Prime: 18413

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 9203

Divisors: 1, 2, 9203, 18406

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 100011111100110

Octal: 43746

Duodecimal: A79A

Hexadecimal: 47e6

Square: 338780836

Square Root: 135.6687141532638

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

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A253350
Numbers k such that numerator(Bernoulli(2·k)/(2·k)) is different from numerator(Bernoulli(2·k)/(2·k*(2·k-1))). A90495
T(n,k) = Number of (n+1) X (k+1) 0..1 arrays with the determinants of 2 X 2 subblocks nondecreasing rightwards and downwards. A204616
T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing. A204800
T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically. A253231
Number of (n+1) X 2 0..1 arrays with the determinants of 2 X 2 subblocks nondecreasing rightwards and downwards. A204609
Convolution of primes with partition numbers. A86717
Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 72 ones. A31840
Number of 0..1 arrays x(0..n-1) of n elements with each no smaller than the sum of its four previous neighbors modulo 2. A200462
Number of (n+1)X(3+1) arrays of permutations of 0..n·4+3 with each element having directed index change 1,1 2,2 -1,0 or 0,-1. A264650