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Properties of the Number 20896

Twenty Thousand Eight Hundred Ninety-Six

Basics

Value: 20895 → 20896 → 20897

Parity: even

Prime: No

Previous Prime: 20887

Next Prime: 20897

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 5 × 653

Divisors: 1, 2, 4, 8, 16, 32, 653, 1306, 2612, 5224

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000110100000

Octal: 50640

Duodecimal: 10114

Hexadecimal: 51a0

Square: 436642816

Square Root: 144.55448799674122

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

Triangle read by rows: T(n,m) (n >= m >= 1) = number of regions (or cells) formed by drawing the line segments connecting any two of the 2*(m+n) perimeter points of an m X n grid of squares. A331452
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no element equal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order. A231419
Numbers n such that (nn-2)/(n-2) is an integer. A242787
Smallest number that is the largest value in the Collatz (3x + 1) trajectories of exactly n initial values. (a(n)=0 if no such number exists.) A233293
Number of divisor chains of length n which begin with n ("anchored" divisor chains). A94097
Number of divisor chains of length 2n+1 which are both cyclic and anchored. A94099
Number of 2 X 2 matrices having all terms in {1,...,n} and nonnegative even determinant. A211066
Irregular table read by rows: Take a triangle with Pythagorean triple leg lengths with all diagonals drawn, as in A332978. Then T(n,k) = number of k-sided polygons in that figure for k >= 3 where the legs are divided into unit length parts. A333135
The number of homogeneous trisubstituted linear alkanes. A159938
a(n) = φ(Padovan(n+4)). A107797