31323203013020 has 24 divisors (see below), whose sum is σ = 65778950890800. Its totient is φ = 12529238431232.

The previous prime is 31323203013007. The next prime is 31323203013023. The reversal of 31323203013020 is 2031030232313.

It is a super-2 number, since 2×31323203013020² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323203013023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3702311 + ... + 8738049.

It is an arithmetic number, because the mean of its divisors is an integer number (2740789620450).

Almost surely, 2^{31323203013020} is an apocalyptic number.

It is an amenable number.

31323203013020 is an abundant number, since it is smaller than the sum of its proper divisors (34455747877780).

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

31323203013020 is a wasteful number, since it uses less digits than its factorization.

31323203013020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5346757 (or 5346755 counting only the distinct ones).

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

Adding to 31323203013020 its reverse (2031030232313), we get a palindrome (33354233245333).

The spelling of 31323203013020 in words is "thirty-one trillion, three hundred twenty-three billion, two hundred three million, thirteen thousand, twenty".