Properties of the Number 20046

Twenty Thousand Forty-Six

Basics

Value: 20045 → 20046 → 20047

Parity: even

Prime: No

Previous Prime: 20029

Next Prime: 20047

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 13 × 257

Divisors: 1, 2, 3, 6, 13, 26, 39, 78, 257, 514

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111001001110

Octal: 47116

Duodecimal: B726

Hexadecimal: 4e4e

Square: 401842116

Square Root: 141.58389738949836

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

29-gonal numbers: a(n) = n*(27·n-25)/2. A255187

Expansion of (1/x) * Series_Reversion( x * (1/(1-x³) - x) ). A370840

a(n) = ∑_k=0..n A136595(n,k)*n^k. A136588

Positive numbers k such that k and 3·k are anagrams in base 7 (written in base 7). A23069

Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,3,2. A37681

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 611", based on the 5-celled von Neumann neighborhood. A273214

Square array: A(r,1) = A065621(r); for c > 1, A(r,c) = A048724(A(r,c-1)), read by descending antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), etc. A277820

a(n) = floor(γ(n+11/12)/γ(11/12)). A20046

Number of nX4 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 3,1,2,0,4 for x=0,1,2,3,4. A196908