18008032 has 48 divisors (see below), whose sum is σ = 42910560. Its totient is φ = 7262208.

The previous prime is 18008027. The next prime is 18008033. The reversal of 18008032 is 23080081.

It is a junction number, because it is equal to n+sod(n) for n = 18007994 and 18008012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18008033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444 + ... + 6172.

It is an arithmetic number, because the mean of its divisors is an integer number (893970).

Almost surely, 2^18008032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18008032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21455280).

18008032 is an abundant number, since it is smaller than the sum of its proper divisors (24902528).

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

18008032 is a wasteful number, since it uses less digits than its factorization.

18008032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763 (or 4755 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 18008032 is about 4243.5871618243. The cubic root of 18008032 is about 262.1131147259.

The spelling of 18008032 in words is "eighteen million, eight thousand, thirty-two".