Properties of the Number 20659

Twenty Thousand Six Hundred Fifty-Nine

Basics

Value: 20658 → 20659 → 20660

Parity: odd

Prime: No

Previous Prime: 20641

Next Prime: 20663

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 73 × 283

Divisors: 1, 73, 283, 20659

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000010110011

Octal: 50263

Duodecimal: BB57

Hexadecimal: 50b3

Square: 426794281

Square Root: 143.73239022572469

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 planar distributive lattices with n nodes. A343161

a(n) = ceiling(a(n-1)/2) + a(n-2) with a(0)=0 and a(1)=1. A64651

The number of possible values of the squarefree kernel (A007947) shared by at least two solutions·to A056239(x) = n. A88318

A musically inspired Titius-Bode-like sequence based on the geometric division of 4- and 5-dimensional space: Z_n+1 = 3 * (C(n-1, 0) + C(n-1, 1) + C(n-1, 2) + C(n-1, 3) + C(n-1, 4) + C(n-1, 5)*A059620(n+6)) + 4. A209257

Number of 6-ary rooted trees with n nodes and height exactly 6. A36644

Expansion of ∑_k>=0 x^k*(k+1) / ∏_j=1..k (1 - x^j)^j. A306664

Lexicographically earliest increasing sequence of nonnegative numbers that contains no arithmetic progression of length 8. A20659

Trajectory of 7 under the map m -> A082010(m). A152199

Number of nX5 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 1,3,0,2,4 for x=0,1,2,3,4. A196319