Properties of the Number 18495

Eighteen Thousand Four Hundred Ninety-Five

Basics

Value: 18494 → 18495 → 18496

Parity: odd

Prime: No

Previous Prime: 18493

Next Prime: 18503

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 × 137

Divisors: 1, 3, 5, 9, 15, 27, 45, 135, 137, 411

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100100000111111

Octal: 44077

Duodecimal: A853

Hexadecimal: 483f

Square: 342065025

Square Root: 135.99632347971763

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

a(n) = 16n² + 32n + 15. A141759

a(n) = n*(6·n² - 8·n + 3). A272378

Numbers k such that τ(k+1) - τ(k) = 5, where τ(k) = the number of divisors of k (A000005). A228453

a(n) = ∑_i=0..n digsum₈(i)³, where digsum₈(i) = A053829(i). A231682

a(n) = 64·n² - 1. A158684

Numbers k such that k | 5^k + 4^k + 3^k + 2^k + 1^k. A56741

a(n) = (n-1)*(n+2)*(n² + n + 2)/4. A168566

Triangle read by rows: T(n,k) is the number of dispersed Dyck paths of length n (i.e., Motzkin paths of length n with no (1,0)-steps at positive heights) having k DHU's (here U=(1,1), H=(1,0), and D=(1,-1)). A191397

Deficient numbers n having a companion m > n such that σ(n)/n = σ(m)/m. A212608

Numbers of the form 16n² + 32n + 15 for which the central region of its symmetric representation of σ consists of two subparts of sizes 4n+7 and 4n+1, n>=0. A335574