Properties of the Number 20236

Twenty Thousand Two Hundred Thirty-Six

Basics

Value: 20235 → 20236 → 20237

Parity: even

Prime: No

Previous Prime: 20233

Next Prime: 20249

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5059

Divisors: 1, 2, 4, 5059, 10118, 20236

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111100001100

Octal: 47414

Duodecimal: B864

Hexadecimal: 4f0c

Square: 409495696

Square Root: 142.25329521666626

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 length n+2 0..k arrays with no three consecutive terms having the sum of any two elements equal to twice the third. A248461

Generalized Fibonacci numbers D_n,3. A6211

Bisection of A096441. A96967

A Fielder sequence. a(n) = a(n-1) + a(n-3) + a(n-4) + a(n-5), n >= 6. A1639

Numbers k such that 7·2^k - 5 is prime. A58602

a(n) = A051193(A072109(n))/A018804(A072109(n)). A71645

Number of length n+2 0..7 arrays with no three consecutive terms having the sum of any two elements equal to twice the third. A248460

Number of length 3+2 0..n arrays with no three consecutive terms having the sum of any two elements equal to twice the third. A248464

a(n) = ∑_{p in P} y(1)*y(2), where P is the set of partitions of n, and y(k) is the number of parts with multiplicity at least k in p. A316861

Number of free polyominoes with n cells with at most 4 collinear cell centers on any line in the plane. A380990