31820478822 has 24 divisors (see below), whose sum is σ = 75212041320. Its totient is φ = 9642569280.

The previous prime is 31820478769. The next prime is 31820478869. The reversal of 31820478822 is 22887402813.

It is a super-2 number, since 2×31820478822² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80354547 + ... + 80354942.

It is an arithmetic number, because the mean of its divisors is an integer number (3133835055).

Almost surely, 2^31820478822 is an apocalyptic number.

31820478822 is an abundant number, since it is smaller than the sum of its proper divisors (43391562498).

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

31820478822 is a wasteful number, since it uses less digits than its factorization.

31820478822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160709508 (or 160709505 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The spelling of 31820478822 in words is "thirty-one billion, eight hundred twenty million, four hundred seventy-eight thousand, eight hundred twenty-two".