Properties of the Number 18524

Eighteen Thousand Five Hundred Twenty-Four

Basics

Value: 18523 → 18524 → 18525

Parity: even

Prime: No

Previous Prime: 18523

Next Prime: 18539

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 11 × 421

Divisors: 1, 2, 4, 11, 22, 44, 421, 842, 1684, 4631

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100100001011100

Octal: 44134

Duodecimal: A878

Hexadecimal: 485c

Square: 343138576

Square Root: 136.10290224679267

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

Coordination sequence for hexagonal close-packing. A7899

Numbers n such that Bernoulli number B_n has denominator 690. A272186

Numbers n such that A182134(n) = 3, i.e., there exist only three primes p with prime(n) < p < prime(n)^{1 + 1/n}. A246781

G.f. A(x) satisfies: A(x) = A(x² - x⁵)/x. A350477

Smallest number a(n)>a(n-1) such that T(a(n-1))+T(a(n))=T(m) for some m, a(1)=3; T(i) are the triangular numbers. A72522

Least integers that satisfy sum(n>0,1/a(n)^z)=0, where a(1)=1, a(n+1)>a(n) and z=I·2. A84816

a(0) = 1, a(n) = 42·n² + 2 for n>0. A10023

Number of 2 X 2 matrices having all terms in {1,...,n} and determinant in the closed interval [0,n]. A211057

Number of (n+1) X (4+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically. A253155

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically. A253159