Properties of the Number 18068

Eighteen Thousand Sixty-Eight

Basics

Value: 18067 → 18068 → 18069

Parity: even

Prime: No

Previous Prime: 18061

Next Prime: 18077

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 4517

Divisors: 1, 2, 4, 4517, 9034, 18068

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011010010100

Octal: 43224

Duodecimal: A558

Hexadecimal: 4694

Square: 326452624

Square Root: 134.41726079637243

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

Triangle of coefficients of polynomials u(n,x) jointly generated with A210750; see the Formula section. A210749

a(n) = ceiling(li(2·2ⁿ) - li(2ⁿ)) - (π(2·2ⁿ) - π(2ⁿ)) with li(x) the logarithmic integral and π(x) the prime counting function. A223853

Numbers n whose sum of divisors and number of divisors are both triangular numbers. A70996

G.f. satisfies: A(x) = ∑_n>=0 xⁿ * (3 + A(x)ⁿ)ⁿ. A247331

Powers of fourth root of 8 rounded up. A18068