18133146 has 28 divisors (see below), whose sum is σ = 40784202. Its totient is φ = 6043896.

The previous prime is 18133139. The next prime is 18133189. The reversal of 18133146 is 64133181.

It can be written as a sum of positive squares in only one way, i.e., 17969121 + 164025 = 4239^2 + 405^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 4761 + ... + 7676.

Almost surely, 2^18133146 is an apocalyptic number.

18133146 is an abundant number, since it is smaller than the sum of its proper divisors (22651056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18133146 is an equidigital number, since it uses as much as digits as its factorization.

18133146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12457 (or 12442 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 18133146 is about 4258.3031831940. The cubic root of 18133146 is about 262.7187401231.

The spelling of 18133146 in words is "eighteen million, one hundred thirty-three thousand, one hundred forty-six".