Properties of the Number 18487

Eighteen Thousand Four Hundred Eighty-Seven

Basics

Value: 18486 → 18487 → 18488

Parity: odd

Prime: No

Previous Prime: 18481

Next Prime: 18493

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 7 × 19 × 139

Divisors: 1, 7, 19, 133, 139, 973, 2641, 18487

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100000110111

Octal: 44067

Duodecimal: A847

Hexadecimal: 4837

Square: 341769169

Square Root: 135.96690773861116

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

Coefficient of xⁿ in the expansion of ( (1-x+x³) / (1-x) )ⁿ. A372413

Numbers n such that n and n-1 are differences between 2 positive cubes in at least one way. A38595

Products of three distinct happy primes A035497. A154717

Largest number k such that k² divides A007781(6n+1). A127854

Number of partitions of 3n into at most 5 parts. A256525

a(n) = ∑_i=1..n (prime(i+1)-prime(i))*prime(n+1-i). A343531

Expansion of 1/((1-3x)*(1-6x)*(1-8x)). A17932

Strong pseudoprimes to base 97. A20323

Triangle read by rows: T(n, k) = (n-k)ⁿ - n·k*(n-k) + kⁿ, with T(0, 0) = 1. A129821

Number of strings of numbers x(i=1..4) in 0..n with sum i·x(i) equal to n·4. A184704