31103020323320 has 128 divisors (see below), whose sum is σ = 76550081287680. Its totient is φ = 11279663424000.

The previous prime is 31103020323253. The next prime is 31103020323359. The reversal of 31103020323320 is 2332302030113.

31103020323320 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267009890 + ... + 267126350.

It is an arithmetic number, because the mean of its divisors is an integer number (598047510060).

Almost surely, 2^{31103020323320} 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 31103020323320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38275040643840).

31103020323320 is an abundant number, since it is smaller than the sum of its proper divisors (45447060964360).

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

31103020323320 is a wasteful number, since it uses less digits than its factorization.

31103020323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118117 (or 118113 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31103020323320 its reverse (2332302030113), we get a palindrome (33435322353433).

The spelling of 31103020323320 in words is "thirty-one trillion, one hundred three billion, twenty million, three hundred twenty-three thousand, three hundred twenty".