Properties of the Number 19954

Nineteen Thousand Nine Hundred Fifty-Four

Basics

Value: 19953 → 19954 → 19955

Parity: even

Prime: No

Previous Prime: 19949

Next Prime: 19961

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 11 × 907

Divisors: 1, 2, 11, 22, 907, 1814, 9977, 19954

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110111110010

Octal: 46762

Duodecimal: B66A

Hexadecimal: 4df2

Square: 398162116

Square Root: 141.25862805506785

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

Expansion of g.f. (1/2)*( a*(1+x)ⁿ + b*(1-x)ⁿ⁺²*LerchPhi(x, -n-1, 1) + c·2ⁿ⁺¹*(1-x)ⁿ⁺¹*LerchPhi(x, -n, 1/2) ), where a = 3, b = -3, and c = 1, read by rows. A168552

a(n) = ∑_{k=0..floor(n/4)} C(n-2·k,2·k) * 3^k. A98576

a(n) = n*(21·n-17)/2. A226491

Expansion of ∏_m>=1 (1+q^m)^-11. A22606

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 68 ones. A31836

Number of transitive relations on an n-set with exactly five ordered pairs. A348634

Decimal expansion of tangent of 56 degrees. A19954

Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum 3 or 6 and every diagonal and antidiagonal sum not 3 or 6. A251773