Properties of the Number 19916

Nineteen Thousand Nine Hundred Sixteen

Basics

Value: 19915 → 19916 → 19917

Parity: even

Prime: No

Previous Prime: 19913

Next Prime: 19919

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 13 × 383

Divisors: 1, 2, 4, 13, 26, 52, 383, 766, 1532, 4979

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110111001100

Octal: 46714

Duodecimal: B638

Hexadecimal: 4dcc

Square: 396647056

Square Root: 141.124058898545

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

Numbers n such that Bernoulli number B_n has denominator 1590. A272140

Conjectured list of sociable numbers. A122726

The 28-cycle of the n => σ(n)-n process, where σ(n) is the sum of divisors of n (A000203). A72890

Positions of squares in A276573. A277014

Consecutive states of the linear congruential pseudo-random number generator (10924·s+11830) mod (2¹⁵+1) when started at s=1. A384150

Braided power sequence: A065692 is b(n+1) = 3·b(n) + 2·d(n) - c(n), A065693 is c(n+1) = 3·c(n) + 2·b(n) - d(n) and this is d(n+1) = 3·d(n) + 2·c(n) - b(n), starting with b(0) = 0, c(0) = 1 and d(0) = 2. A65694

Conjectured list of numbers which are perfect, amicable, or sociable. A347770

Position of 30ⁿ among 5-smooth numbers A051037. A372400

Expansion of 1 / ((1-x)² - x⁶). A392541

Denominators of continued fraction convergents to sqrt(217). A41405