31311002322020 has 96 divisors (see below), whose sum is σ = 66134743315200. Its totient is φ = 12451919560704.

The previous prime is 31311002321981. The next prime is 31311002322023. The reversal of 31311002322020 is 2022320011313.

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 = 31311002321983 and 31311002322001.

It is not an unprimeable number, because it can be changed into a prime (31311002322023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8847413411 + ... + 8847416949.

It is an arithmetic number, because the mean of its divisors is an integer number (688903576200).

Almost surely, 2^{31311002322020} is an apocalyptic number.

It is an amenable number.

31311002322020 is an abundant number, since it is smaller than the sum of its proper divisors (34823740993180).

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

31311002322020 is a wasteful number, since it uses less digits than its factorization.

31311002322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6597 (or 6595 counting only the distinct ones).

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

Adding to 31311002322020 its reverse (2022320011313), we get a palindrome (33333322333333).

The spelling of 31311002322020 in words is "thirty-one trillion, three hundred eleven billion, two million, three hundred twenty-two thousand, twenty".