18475228 has 6 divisors (see below), whose sum is σ = 32331656. Its totient is φ = 9237612.

The previous prime is 18475211. The next prime is 18475229. The reversal of 18475228 is 82257481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18475229) 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, 2309400 + ... + 2309407.

Almost surely, 2^18475228 is an apocalyptic number.

It is an amenable number.

18475228 is a deficient number, since it is larger than the sum of its proper divisors (13856428).

18475228 is a wasteful number, since it uses less digits than its factorization.

18475228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4618811 (or 4618809 counting only the distinct ones).

The product of its digits is 35840, while the sum is 37.

The square root of 18475228 is about 4298.2819823739. The cubic root of 18475228 is about 264.3605228973.

The spelling of 18475228 in words is "eighteen million, four hundred seventy-five thousand, two hundred twenty-eight".