18522368 has 18 divisors (see below), whose sum is σ = 36972894. Its totient is φ = 9261056.

The previous prime is 18522353. The next prime is 18522377. The reversal of 18522368 is 86322581.

It can be written as a sum of positive squares in only one way, i.e., 18386944 + 135424 = 4288^2 + 368^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35921 + ... + 36432.

Almost surely, 2^18522368 is an apocalyptic number.

It is an amenable number.

18522368 is a deficient number, since it is larger than the sum of its proper divisors (18450526).

18522368 is an frugal number, since it uses more digits than its factorization.

18522368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72369 (or 72355 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 18522368 is about 4303.7620752082. The cubic root of 18522368 is about 264.5851727375.

The spelling of 18522368 in words is "eighteen million, five hundred twenty-two thousand, three hundred sixty-eight".