18328513 has 16 divisors (see below), whose sum is σ = 21565440. Its totient is φ = 15253056.

The previous prime is 18328511. The next prime is 18328523. The reversal of 18328513 is 31582381.

It is not a de Polignac number, because 18328513 - 2¹ = 18328511 is a prime.

It is a Duffinian number.

18328513 is a Rhonda number in base 10.

Its product of digits (5760) is a multiple of the sum of its prime divisors (576).

It is not an unprimeable number, because it can be changed into a prime (18328511) 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 15 ways as a sum of consecutive naturals, for example, 46923 + ... + 47311.

It is an arithmetic number, because the mean of its divisors is an integer number (1347840).

Almost surely, 2^18328513 is an apocalyptic number.

It is an amenable number.

18328513 is a deficient number, since it is larger than the sum of its proper divisors (3236927).

18328513 is a wasteful number, since it uses less digits than its factorization.

18328513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576.

The product of its digits is 5760, while the sum is 31.

The square root of 18328513 is about 4281.1812622219. The cubic root of 18328513 is about 263.6588846938.

The spelling of 18328513 in words is "eighteen million, three hundred twenty-eight thousand, five hundred thirteen".