31820665482 has 80 divisors (see below), whose sum is σ = 73444773600. Its totient is φ = 10289801952.

The previous prime is 31820665427. The next prime is 31820665493. The reversal of 31820665482 is 28456602813.

31820665482 is a `hidden beast` number, since 31 + 82 + 0 + 6 + 65 + 482 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2072269 + ... + 2087567.

It is an arithmetic number, because the mean of its divisors is an integer number (918059670).

Almost surely, 2^31820665482 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31820665482, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36722386800).

31820665482 is an abundant number, since it is smaller than the sum of its proper divisors (41624108118).

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

31820665482 is a wasteful number, since it uses less digits than its factorization.

31820665482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15697 (or 15688 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 31820665482 in words is "thirty-one billion, eight hundred twenty million, six hundred sixty-five thousand, four hundred eighty-two".