Properties of the Number 17930

Seventeen Thousand Nine Hundred Thirty

Basics

Value: 17929 → 17930 → 17931

Parity: even

Prime: No

Previous Prime: 17929

Next Prime: 17939

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 × 11 × 163

Divisors: 1, 2, 5, 10, 11, 22, 55, 110, 163, 326

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011000001010

Octal: 43012

Duodecimal: A462

Hexadecimal: 460a

Square: 321484900

Square Root: 133.90294993016397

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

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. A299060

Number of bracelets (turnover necklaces) of n beads of 2 colors, 9 of them black. A32281

Numbers such that all subsets of {a(1)²,...,a(n)²} have a different sum. A138857

G.f.: A(x) = ∑_n>=0 xⁿ / ∏_k=1..n (1-x^k)^n-k+1. A206119

a(n) = 1·prime(n) + 2·prime(n-1) + ... + k·prime(n+1-k), where k=floor((n+1)/2) and prime(n) is the n-th prime. A23870

Number of binary words of length n containing at least one subword 10⁹1 and no subwords 10ⁱ1 with i<9. A143289

Number of rooted identity trees with n nodes and exactly 10 subtrees from the root. A227814

A382168 with duplicates removed. A382169

a(n) = 1·t(n) + 2·t(n-1) + ... + k·t(n+1-k), where k=floor((n+1)/2) and t = A008578 ({1} U primes). A23862

a(n) = 2 + floor((1 + ∑_j=1..n-1 a(j))/4). A120161