Properties of the Number -21444

Twenty-One Thousand Four Hundred Forty-Four

Basics

Value: -21445 → -21444 → -21443

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 1787

Divisors: 1, 2, 3, 4, 6, 12, 1787, 3574, 5361, 7148

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -101001111000100

Octal: -51704

Duodecimal: -104B0

Hexadecimal: -53c4

Square: 459845136

Square Root: 146.43770006388382

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

a(n) = coefficient of xⁿ in A(x) such that: 1 = ∑_n=-oo..+oo xⁿ * (A(x) - x^4·n+3)^n-1. A358963

Number of steps needed to reach position "YZ^n-1" in the Towers of Hanoi exchanging disks puzzle with 3 pegs and n disks. A341580

a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (odd natural numbers), t = (primes). A25117

Number of right triangles on a (n+1) X 4 grid. A189808

1-sequence of reduction of (3n-2) by x² -> x+1. A192312