18808474 has 4 divisors (see below), whose sum is σ = 28212714. Its totient is φ = 9404236.

The previous prime is 18808453. The next prime is 18808487. The reversal of 18808474 is 47480881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15657849 + 3150625 = 3957^2 + 1775^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4702117 + ... + 4702120.

Almost surely, 2^18808474 is an apocalyptic number.

18808474 is a deficient number, since it is larger than the sum of its proper divisors (9404240).

18808474 is an equidigital number, since it uses as much as digits as its factorization.

18808474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9404239.

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 18808474 is about 4336.8737588267. The cubic root of 18808474 is about 265.9405241364.

The spelling of 18808474 in words is "eighteen million, eight hundred eight thousand, four hundred seventy-four".