18328942 has 4 divisors (see below), whose sum is σ = 27493416. Its totient is φ = 9164470.

The previous prime is 18328903. The next prime is 18328943. The reversal of 18328942 is 24982381.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×18328942² = 671900229678728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18328943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4582234 + ... + 4582237.

It is an arithmetic number, because the mean of its divisors is an integer number (6873354).

Almost surely, 2^18328942 is an apocalyptic number.

18328942 is a deficient number, since it is larger than the sum of its proper divisors (9164474).

18328942 is an equidigital number, since it uses as much as digits as its factorization.

18328942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9164473.

The product of its digits is 27648, while the sum is 37.

The square root of 18328942 is about 4281.2313649229. The cubic root of 18328942 is about 263.6609417579.

The spelling of 18328942 in words is "eighteen million, three hundred twenty-eight thousand, nine hundred forty-two".