18000552 has 32 divisors (see below), whose sum is σ = 47649600. Its totient is φ = 5647104.

The previous prime is 18000547. The next prime is 18000571. The reversal of 18000552 is 25500081.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21652 + ... + 22467.

It is an arithmetic number, because the mean of its divisors is an integer number (1489050).

Almost surely, 2^18000552 is an apocalyptic number.

18000552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18000552 is an abundant number, since it is smaller than the sum of its proper divisors (29649048).

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

18000552 is a wasteful number, since it uses less digits than its factorization.

18000552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44145 (or 44141 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 18000552 is about 4242.7057404444. The cubic root of 18000552 is about 262.0768183736.

The spelling of 18000552 in words is "eighteen million, five hundred fifty-two", and thus it is an aban number.