Properties of the Number -20578

Twenty Thousand Five Hundred Seventy-Eight

Basics

Value: -20579 → -20578 → -20577

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 10289

Divisors: 1, 2, 10289, 20578

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -101000001100010

Octal: -50142

Duodecimal: -BAAA

Hexadecimal: -5062

Square: 423454084

Square Root: 143.45033983926285

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)=Agreement numbers: number of nXk arrays of the count of horizontal and vertical neighbors equal to the corresponding element in a random 0..2 nXk array. A220800

Numbers n such that the decimal equivalent of the binary reflected Gray code representation of n is a palindromic prime. A281382

Row sums of triangle A131819. A131820

Number of n X 2 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 3 binary array having a sum of three or less, with rows and columns of the latter in lexicographically nondecreasing order. A227265

Agreement numbers: number of nX3 arrays of the count of horizontal and vertical neighbors equal to the corresponding element in a random 0..2 nX3 array. A220798

Agreement numbers: number of nX4 arrays of the count of horizontal and vertical neighbors equal to the corresponding element in a random 0..2 nX4 array. A220799