Properties of the Number 19902

Nineteen Thousand Nine Hundred Two

Basics

Value: 19901 → 19902 → 19903

Parity: even

Prime: No

Previous Prime: 19891

Next Prime: 19913

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 31 × 107

Divisors: 1, 2, 3, 6, 31, 62, 93, 107, 186, 214

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110110111110

Octal: 46676

Duodecimal: B626

Hexadecimal: 4dbe

Square: 396089604

Square Root: 141.07444843060702

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

Number of independent polynomial invariants of symmetric matrix of order n. A7719

Four-column table read by rows: number of nonisomorphic systems of catafusenes in an example (see Cyvin et al. (1994) for precise definition). A121178

G.f.: (1+x+x²-sqrt(1+2x+3x²-2x³+x⁴))/2. A129509

Nonisomorphic catacondensed monoheptafusenes (see reference for precise definition). A45904

Coordination sequence for Cr3Si, Cr position. A9928

Expansion of (1 - x + x² + sqrt(1 + 2·x + 3·x² - 2·x³ + x⁴)) / 2 in powers of x. A239466

Decimal expansion of tangent of 4 degrees. A19902