Properties of the Number 19442

Nineteen Thousand Four Hundred Forty-Two

Basics

Value: 19441 → 19442 → 19443

Parity: even

Prime: No

Previous Prime: 19441

Next Prime: 19447

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 9721

Divisors: 1, 2, 9721, 19442

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101111110010

Octal: 45762

Duodecimal: B302

Hexadecimal: 4bf2

Square: 377991364

Square Root: 139.43457247038842

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

Numbers k such that 1/(1/φ(k) + 1/φ(k+1) + 1/φ(k+2) + 1/φ(k+3)) is an integer. A73544

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 446", based on the 5-celled von Neumann neighborhood. A288338

Number of compositions (ordered partitions) of n into distinct parts, the least being 7. A339170

a(0) = 1, a(n) = 15·n² + 2 for n>0. A10005

Numbers k such that Fibonacci(k) has a Fibonacci number of 1's in its binary representation. A382053

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 214", based on the 5-celled von Neumann neighborhood. A270907

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 801", based on the 5-celled von Neumann neighborhood. A273575

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MEL = ZSM-11 Nan[AlnSi96-nO192] starting with a T4 atom. A19150

Numbers m such that a Hadamard matrix of order m exists. A19442

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