Properties of the Number 19436

Nineteen Thousand Four Hundred Thirty-Six

Basics

Value: 19435 → 19436 → 19437

Parity: even

Prime: No

Previous Prime: 19433

Next Prime: 19441

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 43 × 113

Divisors: 1, 2, 4, 43, 86, 113, 172, 226, 452, 4859

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101111101100

Octal: 45754

Duodecimal: B2B8

Hexadecimal: 4bec

Square: 377758096

Square Root: 139.41305534274758

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) = number of Egyptian fractions 1 = 1/x₁ + ... + 1/x_k (for any k), 0<x₁<...<x_k<=n. A92670

Expansion of ((1 + 4·x)/(1 - 4·x))^1/4. A303537

Least d > 0 such that both Q = M + 2d and R = M + (M²-1)/(Q-M) are prime, where M = 2ⁿ - 1 = A000225(n), or 0 if there is no such d. A320875

Sum of n-th row of triangle in A082196. A82199

Bisections are {b(n)*b(n+1), n>=0} (shifted) and {b(n)², n>=0} where {b(n), n>=0} is the self-convolution of this sequence, with a(0)=1. A173610

Even bisection of A173610. A173613

Triangle T(n, k, q) = (1-qⁿ)*(1/k)*binomial(n-1, k-1)*binomial(n, k-1) - (1-qⁿ) + 1, for q = 4, read by rows. A174733

Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >n. A210291

Greatest number (in decimal representation) with n nonprime substrings in base-3 representation (substrings with leading zeros are considered to be nonprime). A217113

Number of ways to choose a strict rooted partition of each part in a constant rooted partition of n. A301768