Properties of the Number 18200

Eighteen Thousand Two Hundred

Basics

Value: 18199 → 18200 → 18201

Parity: even

Prime: No

Previous Prime: 18199

Next Prime: 18211

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 5 ² × 7 × 13

Divisors: 1, 2, 4, 5, 7, 8, 10, 13, 14, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100011100011000

Octal: 43430

Duodecimal: A648

Hexadecimal: 4718

Square: 331240000

Square Root: 134.90737563232042

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

Number of ways to partition 2n+1 into distinct positive integers. A78408

Array A(n,k) = n·A(n,k-1) + A(n,k-2) read by upward antidiagonals, starting A(n,0) = 0, A(n,1) = 1. A172236

a(n) = 7·a(n-1) + a(n-2), with a(0)=1 and a(1)=7. A54413

The number of regions in a Farey diagram of order (n,n). A358882

a(n) = ∏_k>=0 (1 + floor(n/2^k)). A132269

Number of hexagonal regions in regular n-gon with all diagonals drawn. A67153

Numbers k that, when expressed in base 5 and then interpreted in base 7, give a multiple of k. A62929

Table (read by rows) giving the coefficients of sum formulas of n-th Lucas numbers (A000204). The k-th row (k>=1) contains T(i,k) for i=1 to k, where k=[2·n+1+(-1)^n-1]/4 and T(i,k) satisfies L(n) = ∑_i=1..k T(i,k) * n^k-i / (k-1)!. A101032

Numbers k such that k² + 1 is a Sarrus number (pseudoprime to base 2). A135590

Number of rooted trees with n points and exactly k specified colors: C(n,k), 1<=n, 1<=k<=n. A141610