18328402 has 16 divisors (see below), whose sum is σ = 28472832. Its totient is φ = 8843040.

The previous prime is 18328399. The next prime is 18328403. The reversal of 18328402 is 20482381.

It is not an unprimeable number, because it can be changed into a prime (18328403) 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 7 ways as a sum of consecutive naturals, for example, 5527 + ... + 8197.

It is an arithmetic number, because the mean of its divisors is an integer number (1779552).

Almost surely, 2^18328402 is an apocalyptic number.

18328402 is a deficient number, since it is larger than the sum of its proper divisors (10144430).

18328402 is a wasteful number, since it uses less digits than its factorization.

18328402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 18328402 is about 4281.1682984905. The cubic root of 18328402 is about 263.6583524412.

The spelling of 18328402 in words is "eighteen million, three hundred twenty-eight thousand, four hundred two".