18331849032 has 128 divisors (see below), whose sum is σ = 54455328000. Its totient is φ = 5138724864.

The previous prime is 18331849013. The next prime is 18331849043. The reversal of 18331849032 is 23094813381.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 31 ways as a sum of consecutive naturals, for example, 415288 + ... + 457304.

It is an arithmetic number, because the mean of its divisors is an integer number (425432250).

Almost surely, 2^18331849032 is an apocalyptic number.

18331849032 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 18331849032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27227664000).

18331849032 is an abundant number, since it is smaller than the sum of its proper divisors (36123478968).

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

18331849032 is a wasteful number, since it uses less digits than its factorization.

18331849032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42100 (or 42082 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 18331849032 in words is "eighteen billion, three hundred thirty-one million, eight hundred forty-nine thousand, thirty-two".