18328705 has 8 divisors (see below), whose sum is σ = 22118400. Its totient is φ = 14580336.

The previous prime is 18328693. The next prime is 18328729. The reversal of 18328705 is 50782381.

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

It is a cyclic number.

It is not a de Polignac number, because 18328705 - 2⁷ = 18328577 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9345 + ... + 11134.

It is an arithmetic number, because the mean of its divisors is an integer number (2764800).

Almost surely, 2^18328705 is an apocalyptic number.

It is an amenable number.

18328705 is a deficient number, since it is larger than the sum of its proper divisors (3789695).

18328705 is a wasteful number, since it uses less digits than its factorization.

18328705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20663.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 18328705 is about 4281.2036858809. The cubic root of 18328705 is about 263.6598053418.

The spelling of 18328705 in words is "eighteen million, three hundred twenty-eight thousand, seven hundred five".