18355942332 has 720 divisors, whose sum is σ = 65752135680. Its totient is φ = 4408992000.

The previous prime is 18355942331. The next prime is 18355942337. The reversal of 18355942332 is 23324955381.

18355942332 is a `hidden beast` number, since 1 + 8 + 3 + 5 + 594 + 23 + 32 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18355942331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 121562457 + ... + 121562607.

Almost surely, 2^18355942332 is an apocalyptic number.

18355942332 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 18355942332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32876067840).

18355942332 is an abundant number, since it is smaller than the sum of its proper divisors (47396193348).

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

18355942332 is a wasteful number, since it uses less digits than its factorization.

18355942332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 226 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 18355942332 in words is "eighteen billion, three hundred fifty-five million, nine hundred forty-two thousand, three hundred thirty-two".