18006552 has 24 divisors (see below), whose sum is σ = 48767940. Its totient is φ = 6002160.

The previous prime is 18006497. The next prime is 18006557. The reversal of 18006552 is 25560081.

18006552 is a `hidden beast` number, since 1 + 8 + 0 + 0 + 655 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18006557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124974 + ... + 125117.

Almost surely, 2^18006552 is an apocalyptic number.

18006552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18006552 is an abundant number, since it is smaller than the sum of its proper divisors (30761388).

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

18006552 is a wasteful number, since it uses less digits than its factorization.

18006552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250103 (or 250096 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 18006552 is about 4243.4127774705. The cubic root of 18006552 is about 262.1059338924.

The spelling of 18006552 in words is "eighteen million, six thousand, five hundred fifty-two".