18328045 has 4 divisors (see below), whose sum is σ = 21993660. Its totient is φ = 14662432.

The previous prime is 18328039. The next prime is 18328049. The reversal of 18328045 is 54082381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54082381 = 149 ⋅362969.

It can be written as a sum of positive squares in 2 ways, for example, as 7946761 + 10381284 = 2819^2 + 3222^2 .

It is a cyclic number.

It is not a de Polignac number, because 18328045 - 2¹⁹ = 17803757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18327998 and 18328016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18328049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1832800 + ... + 1832809.

It is an arithmetic number, because the mean of its divisors is an integer number (5498415).

Almost surely, 2^18328045 is an apocalyptic number.

It is an amenable number.

18328045 is a deficient number, since it is larger than the sum of its proper divisors (3665615).

18328045 is an equidigital number, since it uses as much as digits as its factorization.

18328045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665614.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 18328045 is about 4281.1266040611. The cubic root of 18328045 is about 263.6566405872.

The spelling of 18328045 in words is "eighteen million, three hundred twenty-eight thousand, forty-five".