18474018 has 8 divisors (see below), whose sum is σ = 36948048. Its totient is φ = 6158004.

The previous prime is 18474017. The next prime is 18474059. The reversal of 18474018 is 81047481.

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

18474018 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 18474018.

It is not an unprimeable number, because it can be changed into a prime (18474017) 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, 1539496 + ... + 1539507.

It is an arithmetic number, because the mean of its divisors is an integer number (4618506).

Almost surely, 2^18474018 is an apocalyptic number.

18474018 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.

18474018 is a wasteful number, since it uses less digits than its factorization.

18474018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079008.

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 18474018 is about 4298.1412261581. The cubic root of 18474018 is about 264.3547515077.

The spelling of 18474018 in words is "eighteen million, four hundred seventy-four thousand, eighteen".