31110322320020 has 24 divisors (see below), whose sum is σ = 65331781770024. Its totient is φ = 12444108947456.

The previous prime is 31110322319969. The next prime is 31110322320043. The reversal of 31110322320020 is 2002322301113.

It can be written as a sum of positive squares in 4 ways, for example, as 8835566011024 + 22274756308996 = 2972468^2 + 4719614^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31110322319974 and 31110322320001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23063252 + ... + 24374868.

It is an arithmetic number, because the mean of its divisors is an integer number (2722157573751).

Almost surely, 2^{31110322320020} is an apocalyptic number.

It is an amenable number.

31110322320020 is an abundant number, since it is smaller than the sum of its proper divisors (34221459450004).

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

31110322320020 is a wasteful number, since it uses less digits than its factorization.

31110322320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497579 (or 2497577 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31110322320020 its reverse (2002322301113), we get a palindrome (33112644621133).

The spelling of 31110322320020 in words is "thirty-one trillion, one hundred ten billion, three hundred twenty-two million, three hundred twenty thousand, twenty".