Properties of the Number 18564

Eighteen Thousand Five Hundred Sixty-Four

Basics

Value: 18563 → 18564 → 18565

Parity: even

Prime: No

Previous Prime: 18553

Next Prime: 18583

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 7 × 13 × 17

Divisors: 1, 2, 3, 4, 6, 7, 12, 13, 14, 17

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100010000100

Octal: 44204

Duodecimal: A8B0

Hexadecimal: 4884

Square: 344622096

Square Root: 136.2497706420088

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) = binomial(3n,n). A5809

Figurate numbers or binomial coefficients C(n,6). A579

Triangle read by rows: T(n, k) = binomial(2n, 2k). A86645

a(n) = (2ⁿ/n!) * ∏_k=0..n-1 (4·k + 1). A4981

Triangle T(n,k), read by rows, defined by T(n,k) = binomial(2·n,n-k). A94527

Numbers divisible by prime(d) for each digit d in their base-9 representation, none of which may be zero. A256879

Triangle read by rows: T(n,k) (n>=0, 0<=k<=A002620(n-1)) is the number of permutations of [n] with k nestings. A263776

Binomial coefficients C(2n,n-3). A2696

Table by antidiagonals of number of ways of choosing k items from n·k. A60539

T(n,k) is the number of n X k arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 n X k array. A219578