18168745 has 8 divisors (see below), whose sum is σ = 24917184. Its totient is φ = 12458544.

The previous prime is 18168737. The next prime is 18168763. The reversal of 18168745 is 54786181.

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

It is not a de Polignac number, because 18168745 - 2³ = 18168737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18168698 and 18168707.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 259519 + ... + 259588.

It is an arithmetic number, because the mean of its divisors is an integer number (3114648).

Almost surely, 2^18168745 is an apocalyptic number.

It is an amenable number.

18168745 is a deficient number, since it is larger than the sum of its proper divisors (6748439).

18168745 is an equidigital number, since it uses as much as digits as its factorization.

18168745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519119.

The product of its digits is 53760, while the sum is 40.

The square root of 18168745 is about 4262.4810850020. The cubic root of 18168745 is about 262.8905509202.

The spelling of 18168745 in words is "eighteen million, one hundred sixty-eight thousand, seven hundred forty-five".