Properties of the Number 18056

Eighteen Thousand Fifty-Six

Basics

Value: 18055 → 18056 → 18057

Parity: even

Prime: No

Previous Prime: 18049

Next Prime: 18059

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 37 × 61

Divisors: 1, 2, 4, 8, 37, 61, 74, 122, 148, 244

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011010001000

Octal: 43210

Duodecimal: A548

Hexadecimal: 4688

Square: 326019136

Square Root: 134.3726162579266

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

T(n,k)=Number of nXk 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other. A201235

Nonnegative values·of solutions (x, y) to the Diophantine equation x² + (x+127)² = y². A129992

Number of partitions of n² into exactly n nonzero squares. A319435

Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutations A127379/A127380 and A127381/A127382. A127384

Least positive k such that k * [RSA-2048]ⁿ + 1 is prime, where RSA-2048 is the 617 decimal digit RSA challenge number A391940(54). A108881

a(n) = floor(9ⁿ/7ⁿ). A94991

Number of nX3 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other. A201230

Union of all unique coefficients of all powers of the g.f. A(x) of this sequence, starting with A(0)=2 and A'(0)=3. A262975

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 67. A31565

Numbers n such that 4n+3 is a palindromic prime. A193419