Properties of the Number 21466

Twenty-One Thousand Four Hundred Sixty-Six

Basics

Value: 21465 → 21466 → 21467

Parity: even

Prime: No

Previous Prime: 21433

Next Prime: 21467

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 10733

Divisors: 1, 2, 10733, 21466

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001111011010

Octal: 51732

Duodecimal: 1050A

Hexadecimal: 53da

Square: 460789156

Square Root: 146.5127980757995

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) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0. A264490

Number of numbers k such that k < d(k)^n/10, where d(k) is the number of divisors of k. A225738

T(n,k)=Number of (n+2)X(k+2) binary arrays with each 3X3 subblock singular. A186052

G.f. satisfies A(x) = (1 + x·A(x)) * (1 - x·A(x)⁴). A364376

Number of (n+2)X4 binary arrays with each 3X3 subblock singular. A186045

Number of decompositions of highly composite numbers (A002182) into unordered sums of two primes. A228943

Number of (n+1) X (4+1) arrays of permutations of 0..n·5+4 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0. A264487

Number of (5+1)X(n+1) arrays of permutations of 0..n·6+5 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0. A264493

Expansion of 1 / ( (1 - x)*(1 + 2·x)*(1 - 4·x) )^1/3. A370781

Number of (n+2)X(n+2) binary arrays with each 3X3 subblock singular. A186043