18135552 has 40 divisors (see below), whose sum is σ = 48318336. Its totient is φ = 6044672.

The previous prime is 18135547. The next prime is 18135581. The reversal of 18135552 is 25553181.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4368 + ... + 7439.

Almost surely, 2^18135552 is an apocalyptic number.

18135552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18135552 is an abundant number, since it is smaller than the sum of its proper divisors (30182784).

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

18135552 is an equidigital number, since it uses as much as digits as its factorization.

18135552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11828 (or 11812 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

The square root of 18135552 is about 4258.5856807161. The cubic root of 18135552 is about 262.7303592383.

The spelling of 18135552 in words is "eighteen million, one hundred thirty-five thousand, five hundred fifty-two".