18281603732 has 12 divisors (see below), whose sum is σ = 36563207520. Its totient is φ = 7834973016.

The previous prime is 18281603699. The next prime is 18281603761. The reversal of 18281603732 is 23730618281.

18281603732 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 18281603732.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 326457182 + ... + 326457237.

It is an arithmetic number, because the mean of its divisors is an integer number (3046933960).

Almost surely, 2^18281603732 is an apocalyptic number.

It is an amenable number.

18281603732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18281603732 is a wasteful number, since it uses less digits than its factorization.

18281603732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652914430 (or 652914428 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 18281603732 in words is "eighteen billion, two hundred eighty-one million, six hundred three thousand, seven hundred thirty-two".