18538122 has 8 divisors (see below), whose sum is σ = 37076256. Its totient is φ = 6179372.

The previous prime is 18538111. The next prime is 18538123. The reversal of 18538122 is 22183581.

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

18538122 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 18538122.

It is not an unprimeable number, because it can be changed into a prime (18538123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1544838 + ... + 1544849.

It is an arithmetic number, because the mean of its divisors is an integer number (4634532).

Almost surely, 2^18538122 is an apocalyptic number.

18538122 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.

18538122 is a wasteful number, since it uses less digits than its factorization.

18538122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089692.

The product of its digits is 3840, while the sum is 30.

The square root of 18538122 is about 4305.5919453659. The cubic root of 18538122 is about 264.6601648337.

The spelling of 18538122 in words is "eighteen million, five hundred thirty-eight thousand, one hundred twenty-two".