18522330 has 16 divisors (see below), whose sum is σ = 44453664. Its totient is φ = 4939280.

The previous prime is 18522313. The next prime is 18522331. The reversal of 18522330 is 3322581.

It is a self number, because there is not a number n which added to its sum of digits gives 18522330.

It is not an unprimeable number, because it can be changed into a prime (18522331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308676 + ... + 308735.

It is an arithmetic number, because the mean of its divisors is an integer number (2778354).

Almost surely, 2^18522330 is an apocalyptic number.

18522330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18522330 is an abundant number, since it is smaller than the sum of its proper divisors (25931334).

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

18522330 is a wasteful number, since it uses less digits than its factorization.

18522330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617421.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 18522330 is about 4303.7576604637. The cubic root of 18522330 is about 264.5849917987.

The spelling of 18522330 in words is "eighteen million, five hundred twenty-two thousand, three hundred thirty".