32380728021 has 16 divisors (see below), whose sum is σ = 47978107200. Its totient is φ = 21584155824.

The previous prime is 32380728001. The next prime is 32380728031. The reversal of 32380728021 is 12082708323.

It is a happy number.

It is not a de Polignac number, because 32380728021 - 2⁵ = 32380727989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32380728001) 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 15 ways as a sum of consecutive naturals, for example, 124315 + ... + 283223.

It is an arithmetic number, because the mean of its divisors is an integer number (2998631700).

Almost surely, 2^32380728021 is an apocalyptic number.

It is an amenable number.

32380728021 is a deficient number, since it is larger than the sum of its proper divisors (15597379179).

32380728021 is a wasteful number, since it uses less digits than its factorization.

32380728021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166465 (or 166459 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 32380728021 in words is "thirty-two billion, three hundred eighty million, seven hundred twenty-eight thousand, twenty-one".