18475474 has 4 divisors (see below), whose sum is σ = 27713214. Its totient is φ = 9237736.

The previous prime is 18475459. The next prime is 18475477. The reversal of 18475474 is 47457481.

It is a happy number.

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., 17164449 + 1311025 = 4143^2 + 1145^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18475477) by changing a digit.

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 as a sum of consecutive naturals, namely, 4618867 + ... + 4618870.

Almost surely, 2^18475474 is an apocalyptic number.

18475474 is a deficient number, since it is larger than the sum of its proper divisors (9237740).

18475474 is an equidigital number, since it uses as much as digits as its factorization.

18475474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9237739.

The product of its digits is 125440, while the sum is 40.

The square root of 18475474 is about 4298.3105983630. The cubic root of 18475474 is about 264.3616962234.

The spelling of 18475474 in words is "eighteen million, four hundred seventy-five thousand, four hundred seventy-four".