18785648 has 20 divisors (see below), whose sum is σ = 41597040. Its totient is φ = 8050944.

The previous prime is 18785617. The next prime is 18785651. The reversal of 18785648 is 84658781.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83753 + ... + 83976.

It is an arithmetic number, because the mean of its divisors is an integer number (2079852).

Almost surely, 2^18785648 is an apocalyptic number.

It is an amenable number.

18785648 is an abundant number, since it is smaller than the sum of its proper divisors (22811392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18785648 is a wasteful number, since it uses less digits than its factorization.

18785648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167744 (or 167738 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 18785648 is about 4334.2413407654. The cubic root of 18785648 is about 265.8328986103.

The spelling of 18785648 in words is "eighteen million, seven hundred eighty-five thousand, six hundred forty-eight".