Properties of the Number 20616

Twenty Thousand Six Hundred Sixteen

Basics

Value: 20615 → 20616 → 20617

Parity: even

Prime: No

Previous Prime: 20611

Next Prime: 20627

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ³ × 3 × 859

Divisors: 1, 2, 3, 4, 6, 8, 12, 24, 859, 1718

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000010001000

Octal: 50210

Duodecimal: BB20

Hexadecimal: 5088

Square: 425019456

Square Root: 143.58272876638054

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

Aliquot sequence starting at 552. A14360

T(n,k)=Number of (n+1)X(k+1) 0..5 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 10 (10 maximizes T(1,1)), and no two adjacent values equal. A233958

Expansion of 1 / (χ(-x) * χ(-x³)) in powers of·where χ() is a Ramanujan θ function. A328798

a(n) = n * ∑_d∣n (binomial(n,d) / gcd(n,d)). A105863

Number of 5-ary rooted trees with n nodes and height exactly 4. A36635

Number of (n+1)X(2+1) 0..5 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 10, and no two adjacent values equal. A233952

Number of (n+1)X(3+1) 0..5 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 10, and no two adjacent values equal. A233953

The number of permutations p of {1,...,n} such that |p(i)-p(i+1)| is in {1,2,3,4} for all i from 1 to n-1. A174701

Number of independent sets of nodes in the armchair (3,3) carbon nanotorus graph of breadth n (n>=1). A182141

Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero. A298191