Properties of the Number 18016

Eighteen Thousand Sixteen

Basics

Value: 18015 → 18016 → 18017

Parity: even

Prime: No

Previous Prime: 18013

Next Prime: 18041

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ⁵ × 563

Divisors: 1, 2, 4, 8, 16, 32, 563, 1126, 2252, 4504

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011001100000

Octal: 43140

Duodecimal: A514

Hexadecimal: 4660

Square: 324576256

Square Root: 134.22369388450014

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

Stack polyominoes with square core. A188674

O.g.f. A(x) satisfies: [xⁿ] exp( n² * A(x) ) = n³ * [x^n-1] exp( n² * A(x) ) for n>=1. A300593

a(n) = ∑_i=0..n digsum₅(i)⁴, where digsum₅(i) = A053824(i). A231671

Number of essentially series oriented series-parallel networks with n elements and without multiple unit elements in parallel. A339288

a(n) = ((4+sqrt(5))*(2+sqrt(5))ⁿ + (4-sqrt(5))*(2-sqrt(5))ⁿ)/2. A163070

a(0) = 0, a(1) = 1, for n > 1, a(n) = 2ⁿ⁺¹ - 3*(σ((2ⁿ)-1) - σ((2^n-1)-1)). A329892

Index values for new maxima in A065925. A65926

E.g.f.: arctan(cos(x)²) - π/4. A213067

Consider the figure made up of a row of n adjacent congruent rectangles, with diagonals of all possible rectangles drawn; a(n) is the number of interior vertices where exactly four lines cross. A336490

Numerators of continued fraction convergents to sqrt(245). A41458