Properties of the Number 20608

Twenty Thousand Six Hundred Eight

Basics

Value: 20607 → 20608 → 20609

Parity: even

Prime: No

Previous Prime: 20599

Next Prime: 20611

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ⁷ × 7 × 23

Divisors: 1, 2, 4, 7, 8, 14, 16, 23, 28, 32

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000010000000

Octal: 50200

Duodecimal: BB14

Hexadecimal: 5080

Square: 424689664

Square Root: 143.5548675594109

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

Triangle read by rows: T(n, m) = S1(n, m)*8^n-m, where S1 are the signed Stirling numbers of first kind A008275 (n >= 1, 1 <= m <= n). A51187

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements. A251028

Numbers with prime signature {7,1,1}, i.e., of form p⁷*q·r with p, q and r distinct primes. A179696

Coefficients in the expansion of 1/([r] + [2r]x + [3r]x² + ...); [ ] = floor, r = 9/5. A279781

Triangular array: the fission of ((x+1)ⁿ) by ((2x+1)ⁿ). A193858

Triangle of coefficients of polynomials v(n,x) jointly generated with A210866; see the Formula section. A210867

Number of 2 X 2 matrices having all terms in {1,...,n} and odd determinant. A211065

Number of 2 X 2 matrices having all terms in {-n,...,0,..,n} and odd determinant. A211155

Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 481", based on the 5-celled von Neumann neighborhood. A288587

Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 542", based on the 5-celled von Neumann neighborhood. A289095