18380532 has 24 divisors (see below), whose sum is σ = 43155616. Its totient is φ = 6088608.

The previous prime is 18380497. The next prime is 18380539. The reversal of 18380532 is 23508381.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18380532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2743 + ... + 6654.

Almost surely, 2^18380532 is an apocalyptic number.

18380532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18380532 is an abundant number, since it is smaller than the sum of its proper divisors (24775084).

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

18380532 is a wasteful number, since it uses less digits than its factorization.

18380532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9567 (or 9565 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 18380532 is about 4287.2522668954. The cubic root of 18380532 is about 263.9080832444.

The spelling of 18380532 in words is "eighteen million, three hundred eighty thousand, five hundred thirty-two".