18328994 has 8 divisors (see below), whose sum is σ = 27522048. Its totient is φ = 9154980.

The previous prime is 18328991. The next prime is 18328997. The reversal of 18328994 is 49982381.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18328991) and next prime (18328997).

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

It is not an unprimeable number, because it can be changed into a prime (18328991) 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, 2042 + ... + 6389.

It is an arithmetic number, because the mean of its divisors is an integer number (3440256).

Almost surely, 2^18328994 is an apocalyptic number.

18328994 is a deficient number, since it is larger than the sum of its proper divisors (9193054).

18328994 is a wasteful number, since it uses less digits than its factorization.

18328994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9520.

The product of its digits is 124416, while the sum is 44.

The square root of 18328994 is about 4281.2374379378. The cubic root of 18328994 is about 263.6611910968.

The spelling of 18328994 in words is "eighteen million, three hundred twenty-eight thousand, nine hundred ninety-four".