18087552 has 96 divisors (see below), whose sum is σ = 59510880. Its totient is φ = 5165568.

The previous prime is 18087551. The next prime is 18087577. The reversal of 18087552 is 25578081.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18087551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6943 + ... + 9185.

It is an arithmetic number, because the mean of its divisors is an integer number (619905).

Almost surely, 2^18087552 is an apocalyptic number.

18087552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18087552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29755440).

18087552 is an abundant number, since it is smaller than the sum of its proper divisors (41423328).

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

18087552 is a wasteful number, since it uses less digits than its factorization.

18087552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270 (or 2255 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 18087552 is about 4252.9462728795. The cubic root of 18087552 is about 262.4983618945.

The spelling of 18087552 in words is "eighteen million, eighty-seven thousand, five hundred fifty-two".