Properties of the Number 18187

Eighteen Thousand One Hundred Eighty-Seven

Basics

Value: 18186 → 18187 → 18188

Parity: odd

Prime: No

Previous Prime: 18181

Next Prime: 18191

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 13 × 1399

Divisors: 1, 13, 1399, 18187

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011100001011

Octal: 43413

Duodecimal: A637

Hexadecimal: 470b

Square: 330766969

Square Root: 134.8591858198766

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+3)X(k+3) 0..2 matrices with each 4X4 subblock idempotent. A224728

Number of distinct products i·j*k·l for 1 <= i <= j <= k <= l <= n. A100437

Number of nondecreasing integer sequences of length 23 with sum zero and sum of absolute values 2n. A158157

Number of (n+3) X 4 0..2 matrices with each 4 X 4 subblock idempotent. A224721

Semiprimes that are the sum of the first n odd primes for some n. A274182

Antidiagonal sums of the array A391685. A391686

Restricted Perrin pseudoprimes. A18187