Properties of the Number 19406

Nineteen Thousand Four Hundred Six

Basics

Value: 19405 → 19406 → 19407

Parity: even

Prime: No

Previous Prime: 19403

Next Prime: 19417

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 31 × 313

Divisors: 1, 2, 31, 62, 313, 626, 9703, 19406

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100101111001110

Octal: 45716

Duodecimal: B292

Hexadecimal: 4bce

Square: 376592836

Square Root: 139.30541985149034

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

a(n) = n*(4·n² - 3·n + 5)/6. A174723

Relative of Hofstadter Q-sequence: a(n) = max(0, n+19395) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0. A283886

Expansion of ∏_k>=1 1 / (1 + x^k - x^2·k). A276527

Number of (w,x,y,z) with all terms in {0,...,n} and (least gapsize)>1. A212897

g_n(16) where g is the weak Goodstein function defined in A266202. A271992

a(0) = 1, a(n) = 11·n² + 2 for n>0. A10003

Primes with primitive root 84. A19406