18087832 has 16 divisors (see below), whose sum is σ = 38759760. Its totient is φ = 7751904.

The previous prime is 18087827. The next prime is 18087833. The reversal of 18087832 is 23878081.

It is a junction number, because it is equal to n+sod(n) for n = 18087791 and 18087800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18087833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161443 + ... + 161554.

It is an arithmetic number, because the mean of its divisors is an integer number (2422485).

Almost surely, 2^18087832 is an apocalyptic number.

It is an amenable number.

18087832 is an abundant number, since it is smaller than the sum of its proper divisors (20671928).

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

18087832 is a wasteful number, since it uses less digits than its factorization.

18087832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323010 (or 323006 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 18087832 is about 4252.9791911083. The cubic root of 18087832 is about 262.4997164018.

The spelling of 18087832 in words is "eighteen million, eighty-seven thousand, eight hundred thirty-two".