18874434 has 8 divisors (see below), whose sum is σ = 37748880. Its totient is φ = 6291476.

The previous prime is 18874433. The next prime is 18874439. The reversal of 18874434 is 43447881.

It is a sphenic number, since it is the product of 3 distinct primes.

18874434 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18874392 and 18874401.

It is not an unprimeable number, because it can be changed into a prime (18874433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572864 + ... + 1572875.

It is an arithmetic number, because the mean of its divisors is an integer number (4718610).

Almost surely, 2^18874434 is an apocalyptic number.

18874434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18874434 is a wasteful number, since it uses less digits than its factorization.

18874434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145744.

The product of its digits is 86016, while the sum is 39.

The square root of 18874434 is about 4344.4716594771. The cubic root of 18874434 is about 266.2510396926.

The spelling of 18874434 in words is "eighteen million, eight hundred seventy-four thousand, four hundred thirty-four".