18349538 has 8 divisors (see below), whose sum is σ = 28721088. Its totient is φ = 8775844.

The previous prime is 18349481. The next prime is 18349549. The reversal of 18349538 is 83594381.

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

It is a junction number, because it is equal to n+sod(n) for n = 18349495 and 18349504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199406 + ... + 199497.

It is an arithmetic number, because the mean of its divisors is an integer number (3590136).

Almost surely, 2^18349538 is an apocalyptic number.

18349538 is a deficient number, since it is larger than the sum of its proper divisors (10371550).

18349538 is a wasteful number, since it uses less digits than its factorization.

18349538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398928.

The product of its digits is 103680, while the sum is 41.

The square root of 18349538 is about 4283.6360723105. The cubic root of 18349538 is about 263.7596622771.

The spelling of 18349538 in words is "eighteen million, three hundred forty-nine thousand, five hundred thirty-eight".