Properties of the Number 21436

Twenty-One Thousand Four Hundred Thirty-Six

Basics

Value: 21435 → 21436 → 21437

Parity: even

Prime: No

Previous Prime: 21433

Next Prime: 21467

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 23 × 233

Divisors: 1, 2, 4, 23, 46, 92, 233, 466, 932, 5359

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001110111100

Octal: 51674

Duodecimal: 104A4

Hexadecimal: 53bc

Square: 459502096

Square Root: 146.41038214552955

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)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250853

Numbers k such that A118255(k) is prime. A118257

Number of 1's in n-th term of A022470. A22472

Number of (n+1) X (4+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250849

Number of (2+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250854

Numbers n such that n·2²²⁸¹ - 1 is prime. A265504

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 934", based on the 5-celled von Neumann neighborhood. A273794

Number of (n+2) X (1+2) 0..2 arrays with no increasing sequence of length 3 vertically, diagonally downwards or antidiagonally downwards. A234374

Decimal expansion of 1/432. A21436