18430326 has 24 divisors (see below), whose sum is σ = 40687920. Its totient is φ = 6027216.

The previous prime is 18430301. The next prime is 18430327. The reversal of 18430326 is 62303481.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18430326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18430327) 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 11 ways as a sum of consecutive naturals, for example, 8706 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (1695330).

Almost surely, 2^18430326 is an apocalyptic number.

18430326 is an abundant number, since it is smaller than the sum of its proper divisors (22257594).

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

18430326 is a wasteful number, since it uses less digits than its factorization.

18430326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19380 (or 19377 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 18430326 is about 4293.0555551961. The cubic root of 18430326 is about 264.1461828144.

The spelling of 18430326 in words is "eighteen million, four hundred thirty thousand, three hundred twenty-six".