18341538 has 16 divisors (see below), whose sum is σ = 38841120. Its totient is φ = 5754176.

The previous prime is 18341503. The next prime is 18341549. The reversal of 18341538 is 83514381.

It is a junction number, because it is equal to n+sod(n) for n = 18341499 and 18341508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89808 + ... + 90011.

It is an arithmetic number, because the mean of its divisors is an integer number (2427570).

Almost surely, 2^18341538 is an apocalyptic number.

18341538 is an abundant number, since it is smaller than the sum of its proper divisors (20499582).

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

18341538 is a wasteful number, since it uses less digits than its factorization.

18341538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179841.

The product of its digits is 11520, while the sum is 33.

The square root of 18341538 is about 4282.7021843691. The cubic root of 18341538 is about 263.7213255441.

The spelling of 18341538 in words is "eighteen million, three hundred forty-one thousand, five hundred thirty-eight".