Properties of the Number -18809

Eighteen Thousand Eight Hundred Nine

Basics

Value: -18810 → -18809 → -18808

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 7 × 2687

Divisors: 1, 7, 2687, 18809

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100100101111001

Octal: -44571

Duodecimal: -AA75

Hexadecimal: -4979

Square: 353778481

Square Root: 137.1459077041674

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

Expansion of 1/(1 - ∑_k>=1 μ(k)²*x^k), where μ(k) is the Moebius function (A008683). A280194

Number of one-element transitions from the partitions of n to the partitions of n+1 for labeled parts. A93694

Number of compositions of n with strictly decreasing first quotients. A342494

Numbers k > 1 such that k mod ord2(k) is even, where ord2(k) is the order of 2 mod k. A36260

Numbers k whose decimal representation, read as a base-19 value and divided by k, yields an integer. A32569

Number of n X 2 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4. A241050

Number of 0..6 arrays x(0..n-1) of n elements with zero n-1st difference. A200152

Numbers k such that 413·2^k+1 is prime. A323106