Properties of the Number -18230

Eighteen Thousand Two Hundred Thirty

Basics

Value: -18231 → -18230 → -18229

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 × 1823

Divisors: 1, 2, 5, 10, 1823, 3646, 9115, 18230

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -100011100110110

Octal: -43466

Duodecimal: -A672

Hexadecimal: -4736

Square: 332332900

Square Root: 135.01851724856112

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 integer partitions of n where the parts do not have the same median as the distinct parts. A360244

Expansion of 1/(sqrt(1-2x-3x²)-x). A111961

Antichain-Chain Quilt Numbers: Square table of the number of ASM quilts of type A₂(j) x C_k read down antidiagonals, where C_k is the chain poset or rank k and A₂(j) is the rank 2 poset with a unique minimal and maximal element and j atoms. A374822

a(n) = 25·n² + 5. A158445

Monotonic ordering of set S generated by these rules: if·and y are in S then floor(x·y/2) is in S, and 5 is in S. A192520

Number of sets of exactly n positive integers <= n+5 having a square element sum. A281968

Let c(k) denote the k-th composite number and p(k) the k-th prime number; then a(n) = ∑_{i=n*(n-1)/2+1 .. n*(n+1)/2} c(i) - ∑_i=1..n p(i). A24850

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 54. A31732

Let u(0)=1, u(n) = 5/2·floor(u(n-1)); then a(n) = (2/5)*u(n). A76883

a(n) = a(n-1) - a(n-2) + 3·a(n-3) with a(0) = 1, a(1) = 2 and a(2) = 4. A356849