Properties of the Number 19514

Nineteen Thousand Five Hundred Fourteen

Basics

Value: 19513 → 19514 → 19515

Parity: even

Prime: No

Previous Prime: 19507

Next Prime: 19531

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 11 × 887

Divisors: 1, 2, 11, 22, 887, 1774, 9757, 19514

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110000111010

Octal: 46072

Duodecimal: B362

Hexadecimal: 4c3a

Square: 380796196

Square Root: 139.6925194847598

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 k such that τ(k) = τ(k+1) mod 691, where τ is Ramanujan's τ function A000594. A121733

Sin(n) decreases monotonically to -1. A46964

G.f.: exp( ∑_n>=1 A005063(n)*xⁿ/n ), where A005063(n) = sum of squares of primes dividing n. A219224

Numbers k at which point A336459(k) appears multiplicative, but A051027(k) does not. A336561

Expansion of x⁴*(2+x)/((1+x)*(1-x)⁵). A82289

a(1) = 1, and for each k >=2, a(k) is the smallest number n such that n/cos(n) > a(k)/cos(a(k)), so that a(1)/cos(a(1)) > a(2)/cos(a(2)) > ... > a(k)/cos(a(k)) > ... A172446

Expansion of (1+x+x²)/((1+x²)*(1+x)⁴*(1-x)⁵). A82290

Fixed points of permutation A113821. A115640

Number of binary strings of length n with no substrings equal to 0001 or 1000. A164398

a(1) = 1, and for each n >=2, a(n) is the smallest number such that 1/cos(a(n)) < 1/cos(k) for all k < n, so that 1/cos(a(1)) > 1/cos(a(2)) > ... > 1/cos(a(n)) > ... A172448