31113223300020 has 48 divisors (see below), whose sum is σ = 87165885340800. Its totient is φ = 8292206203776.

The previous prime is 31113223300007. The next prime is 31113223300051. The reversal of 31113223300020 is 2000332231113.

It is a self number, because there is not a number n which added to its sum of digits gives 31113223300020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145309095 + ... + 145523054.

It is an arithmetic number, because the mean of its divisors is an integer number (1815955944600).

Almost surely, 2^{31113223300020} is an apocalyptic number.

31113223300020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31113223300020 is an abundant number, since it is smaller than the sum of its proper divisors (56052662040780).

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

31113223300020 is a wasteful number, since it uses less digits than its factorization.

31113223300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290833944 (or 290833942 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31113223300020 its reverse (2000332231113), we get a palindrome (33113555531133).

The spelling of 31113223300020 in words is "thirty-one trillion, one hundred thirteen billion, two hundred twenty-three million, three hundred thousand, twenty".