Properties of the Number 21336

Twenty-One Thousand Three Hundred Thirty-Six

Basics

Value: 21335 → 21336 → 21337

Parity: even

Prime: No

Previous Prime: 21323

Next Prime: 21341

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ³ × 3 × 7 × 127

Divisors: 1, 2, 3, 4, 6, 7, 8, 12, 14, 21

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001101011000

Octal: 51530

Duodecimal: 10420

Hexadecimal: 5358

Square: 455224896

Square Root: 146.0684770920817

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 fully chiral set-systems covering n vertices. A330229

Numbers k such that σ(x) = k has exactly 10 solutions. A60666

Numbers that have exactly six prime factors counted with multiplicity (A046306) whose digit reversal is different and also has 6 prime factors (with multiplicity). A109026

Sum of terms of n-th group in A075383. A75386

Consider the 1-D random walk with jumps to next-nearest neighbors. Sequence gives number of paths of length n ending at origin. A92765

Number of additive Z₂ Z₈ codes of a certain type (see Siap-Aydogdu for precise definition). A226265

Triangle T(n,m,p,q) = (p^n-k*q^k + p^k*q^n-k)*(StirlingS1(n, k) + StirlingS1(n, n-k)) with p=2 and q=1, read by rows. A154913

Number of compositions of n whose non-adjacent parts are strictly decreasing. A333193

Triangle, read by rows, where T(0,0) = 1, T(n,k) = 2ⁿ*T(n-1,k) + T(n-1,k-1). A108084

Table T(n,k) read by rows which contains in row n and column k the sum of A001055(A036035(n,j)) over all column indices j where A036035(n,j) has k distinct prime factors. A93936