18519134 has 4 divisors (see below), whose sum is σ = 27778704. Its totient is φ = 9259566.

The previous prime is 18519133. The next prime is 18519157. The reversal of 18519134 is 43191581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43191581 = 3313 ⋅13037.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18519134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18519133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4629782 + ... + 4629785.

It is an arithmetic number, because the mean of its divisors is an integer number (6944676).

Almost surely, 2^18519134 is an apocalyptic number.

18519134 is a deficient number, since it is larger than the sum of its proper divisors (9259570).

18519134 is an equidigital number, since it uses as much as digits as its factorization.

18519134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9259569.

The product of its digits is 4320, while the sum is 32.

The square root of 18519134 is about 4303.3863410110. The cubic root of 18519134 is about 264.5697730101.

The spelling of 18519134 in words is "eighteen million, five hundred nineteen thousand, one hundred thirty-four".