Properties of the Number 21394

Twenty-One Thousand Three Hundred Ninety-Four

Basics

Value: 21393 → 21394 → 21395

Parity: even

Prime: No

Previous Prime: 21391

Next Prime: 21397

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 19 × 563

Divisors: 1, 2, 19, 38, 563, 1126, 10697, 21394

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001110010010

Octal: 51622

Duodecimal: 1046A

Hexadecimal: 5392

Square: 457703236

Square Root: 146.2668793678186

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

Number of fault-free tilings of a 4 X 2n rectangle with L tetrominoes. A84481

Numbers k such that 6·p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)*p(k+5)-1 and 6·p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)*p(k+5)+1 are twin primes with p(h) = h-th prime. A129311

Number of irreducible representations of the symmetric group S_n such that their degree is divisible by 3. A61569

The sum of the necessary diagonal movements from each square unit of an n X n+1 rectangle to reach any of the corners of the rectangle. A279034

G.f. A(x) satisfies A(x) = 1 / (1 - x - x³ * A(x³)). A367667

Numbers n such that sopfr(n) - (floor(sqrt(n))*bigomega(n)) = floor(sqrt(n)). A180877

Number of partitions of n into a squarefree number of squarefree parts. A286330

Numbers k such that k and 4k, taken together, contain all digits 1 though 9 at least once. A346135

Number of nX3 0..5 arrays with values 0..5 introduced in row major order and no element equal to any horizontal or vertical neighbor. A198977

Expansion of 1/((1-x)(1-3x)(1-4x)(1-11x)). A21394