18945785 has 8 divisors (see below), whose sum is σ = 23120640. Its totient is φ = 14899504.

The previous prime is 18945779. The next prime is 18945799. The reversal of 18945785 is 58754981.

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 18945785 - 2⁸ = 18945529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31817 + ... + 32406.

It is an arithmetic number, because the mean of its divisors is an integer number (2890080).

Almost surely, 2^18945785 is an apocalyptic number.

It is an amenable number.

18945785 is a deficient number, since it is larger than the sum of its proper divisors (4174855).

18945785 is an equidigital number, since it uses as much as digits as its factorization.

18945785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64287.

The product of its digits is 403200, while the sum is 47.

The square root of 18945785 is about 4352.6756139184. The cubic root of 18945785 is about 266.5861206390.

The spelling of 18945785 in words is "eighteen million, nine hundred forty-five thousand, seven hundred eighty-five".