18473228 has 6 divisors (see below), whose sum is σ = 32328156. Its totient is φ = 9236612.

The previous prime is 18473219. The next prime is 18473233. The reversal of 18473228 is 82237481.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2309150 + ... + 2309157.

It is an arithmetic number, because the mean of its divisors is an integer number (5388026).

Almost surely, 2^18473228 is an apocalyptic number.

It is an amenable number.

18473228 is a deficient number, since it is larger than the sum of its proper divisors (13854928).

18473228 is a wasteful number, since it uses less digits than its factorization.

18473228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4618311 (or 4618309 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 18473228 is about 4298.0493249845. The cubic root of 18473228 is about 264.3509832744.

The spelling of 18473228 in words is "eighteen million, four hundred seventy-three thousand, two hundred twenty-eight".