Properties of the Number -20118

Twenty Thousand One Hundred Eighteen

Basics

Value: -20119 → -20118 → -20117

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 × 479

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 479, 958

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100111010010110

Octal: -47226

Duodecimal: -B786

Hexadecimal: -4e96

Square: 404733924

Square Root: 141.83793568717786

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 ∏_k>0 theta₃(q^2·k-1)/theta₃(q^2·k), where theta₃() is the Jacobi θ function. A321026

Numbers n such that Bernoulli number B_n has denominator 1806. A272139

Array T(n,k) read by antidiagonals: T(n,k) is the number of [n,k]-triangulations in the plane, n >= 0, k >= 0. A169808

Numbers k such that σ(k+1) divides σ(k), where σ(k) is the sum of positive divisors of k. A58073

Numbers k such that the average of the divisors of k and k+1 is the same. A238380

Array read by antidiagonals: T(n,k) is the number of unrooted 3-connected triangulations of a disk with n interior nodes and k nodes on the boundary, n >= 1, k >= 3. A342053

Number of unrooted triangulations of the disk with n interior nodes and 3 nodes on the boundary. A2713

a(n) = ∑_k=0..n binomial(k+6,6) * binomial(k,n-k)². A377158

Triangle read by rows: T(n,k) is the number of n-node connected unsensed planar maps with an external face and k triangular internal faces, n >= 3, 1 <= k <= 2·n - 5. A378103

Numbers k such that σ(k) = 2*σ(k+1). A163193