Properties of the Number -18560

Eighteen Thousand Five Hundred Sixty

Basics

Value: -18561 → -18560 → -18559

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁷ × 5 × 29

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 29, 32

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100100010000000

Octal: -44200

Duodecimal: -A8A8

Hexadecimal: -4880

Square: 344473600

Square Root: 136.23509092741122

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 - x)/(1 + x - 2·x² + x³). A78039

Expansion of 1/(1+2·x²+2·x³). A77968

G.f.: 1/(1+x+x³). A199804

Expansion of x³ / ( 1+2·x²+2·x³ ). A123958

Narayana's cows sequence: a(0) = a(1) = a(2) = 1; thereafter a(n) = a(n-1) + a(n-3). A930

a(n) = a(n-1) + a(n-3) for n >= 3, with a(0) = 1, a(1) = a(2) = 0. This recurrence can also be used to define a(n) for n < 0. A78012

Longest edge a of smallest (measured by the longest edge) primitive Euler bricks (a, b, c, sqrt(a² + b²), sqrt(b² + c²), sqrt(a² + c²) are integers). A31173

Expansion of (1-x)²/(1 - 4·x + 3·x² - x³). A52544

Number of odd-length integer partitions of n with integer alternating product. A347444

a(n) = n-1, if n <= 2, otherwise A107458(n-1) + A107458(n-2). A135851