18328425 has 12 divisors (see below), whose sum is σ = 30303120. Its totient is φ = 9775120.

The previous prime is 18328403. The next prime is 18328439. The reversal of 18328425 is 52482381.

It is not a de Polignac number, because 18328425 - 2¹³ = 18320233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122115 + ... + 122264.

It is an arithmetic number, because the mean of its divisors is an integer number (2525260).

Almost surely, 2^18328425 is an apocalyptic number.

18328425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18328425 is a deficient number, since it is larger than the sum of its proper divisors (11974695).

18328425 is a wasteful number, since it uses less digits than its factorization.

18328425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244392 (or 244387 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 18328425 is about 4281.1709846723. The cubic root of 18328425 is about 263.6584627279.

The spelling of 18328425 in words is "eighteen million, three hundred twenty-eight thousand, four hundred twenty-five".