18685088 has 12 divisors (see below), whose sum is σ = 36786330. Its totient is φ = 9342528.

The previous prime is 18685087. The next prime is 18685099. The reversal of 18685088 is 88058681.

It can be written as a sum of positive squares in only one way, i.e., 12475024 + 6210064 = 3532^2 + 2492^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18685081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291923 + ... + 291986.

Almost surely, 2^18685088 is an apocalyptic number.

It is an amenable number.

18685088 is a deficient number, since it is larger than the sum of its proper divisors (18101242).

18685088 is an equidigital number, since it uses as much as digits as its factorization.

18685088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583919 (or 583911 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 44.

The square root of 18685088 is about 4322.6251283219. The cubic root of 18685088 is about 265.3577131935.

The spelling of 18685088 in words is "eighteen million, six hundred eighty-five thousand, eighty-eight".