Properties of the Number -20800

Twenty Thousand Eight Hundred

Basics

Value: -20801 → -20800 → -20799

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ⁶ × 5 ² × 13

Divisors: 1, 2, 4, 5, 8, 10, 13, 16, 20, 25

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101000101000000

Octal: -50500

Duodecimal: -10054

Hexadecimal: -5140

Square: 432640000

Square Root: 144.22205101855957

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

Coefficient of x³ⁿ⁺¹/(3n+1)! in the Maclaurin expansion of the Dixon elliptic function sm(x,0). A104133

Expansion of (Sum x^n², n = -inf .. inf )^-24. A4425

Hankel transform of A158500. A158501

Triangle T(n, k) = k⁴ - n⁴ + 2·k*n*(1 - k²*n²), read by rows. A123963

If X₁, ..., X_n is a partition of a 2n-set X into 2-blocks then a(n) is equal to the number of 3-subsets of X containing none of X_i, (i=1,...,n). A130809

Number of partitions of n containing a clique of size 6. A183563

Numbers whose prime indices have more than one permutation with all equal run-sums. A383015

T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an unequal number of clockwise and counterclockwise edge increases. A207799

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the upper median value of each 2X2 subblock. A235954

Paradigm shift sequence for (4,3) production scheme with replacement. A246097