18128242 has 32 divisors (see below), whose sum is σ = 32256000. Its totient is φ = 7549200.

The previous prime is 18128237. The next prime is 18128263. The reversal of 18128242 is 24282181.

It is a self number, because there is not a number n which added to its sum of digits gives 18128242.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12259 + ... + 13657.

It is an arithmetic number, because the mean of its divisors is an integer number (1008000).

Almost surely, 2^18128242 is an apocalyptic number.

18128242 is a deficient number, since it is larger than the sum of its proper divisors (14127758).

18128242 is a wasteful number, since it uses less digits than its factorization.

18128242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462.

The product of its digits is 2048, while the sum is 28.

The square root of 18128242 is about 4257.7273280472. The cubic root of 18128242 is about 262.6950544214.

The spelling of 18128242 in words is "eighteen million, one hundred twenty-eight thousand, two hundred forty-two".