Properties of the Number 18002

Eighteen Thousand Two

Basics

Value: 18001 → 18002 → 18003

Parity: even

Prime: No

Previous Prime: 17989

Next Prime: 18013

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 9001

Divisors: 1, 2, 9001, 18002

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011001010010

Octal: 43122

Duodecimal: A502

Hexadecimal: 4652

Square: 324072004

Square Root: 134.17153200288055

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

Word structures of length n using a 5-ary alphabet. A56272

Numbers k such that 15^k - 2 is a prime. A128458

Triangle of partial sums of Stirling numbers of 2nd kind (A008277): T(n,k) = ∑_i=1..k Stirling2(n,i), 1<=k<=n. A102661

T(n,k)=Number of nXk 0..4 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..4 introduced in row major order. A209503

Number of palindromic structures using a maximum of five different symbols. A56470

Number of periodic palindromic structures using a maximum of five different symbols. A56506

a(0) = 1, a(n) = 20·n² + 2 for n>0. A10010

Let (u1,u2) be successive untouchable numbers such that φ(u1) = φ(u2); sequence gives values of u1. A48189

Number of monohedral disk tilings of type C^t_{3,n}. A296361

G.f. A(x) satisfies: A(x) = x·exp(A(-x) - A(-x²)/2 + A(-x³)/3 - A(-x⁴)/4 + ...). A307366