31820652052 has 48 divisors (see below), whose sum is σ = 65160184320. Its totient is φ = 13312327392.

The previous prime is 31820652041. The next prime is 31820652067. The reversal of 31820652052 is 25025602813.

It is a junction number, because it is equal to n+sod(n) for n = 31820651999 and 31820652017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2289099 + ... + 2302957.

It is an arithmetic number, because the mean of its divisors is an integer number (1357503840).

Almost surely, 2^31820652052 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31820652052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32580092160).

31820652052 is an abundant number, since it is smaller than the sum of its proper divisors (33339532268).

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

31820652052 is a wasteful number, since it uses less digits than its factorization.

31820652052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15820 (or 15818 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 31820652052 in words is "thirty-one billion, eight hundred twenty million, six hundred fifty-two thousand, fifty-two".