31320311312020 has 24 divisors (see below), whose sum is σ = 68632334354304. Its totient is φ = 11983423458336.

The previous prime is 31320311312011. The next prime is 31320311312029. The reversal of 31320311312020 is 2021311302313.

It is an interprime number because it is at equal distance from previous prime (31320311312011) and next prime (31320311312029).

It is a junction number, because it is equal to n+sod(n) for n = 31320311311982 and 31320311312000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320311312029) 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, 34043816184 + ... + 34043817103.

It is an arithmetic number, because the mean of its divisors is an integer number (2859680598096).

Almost surely, 2^{31320311312020} is an apocalyptic number.

It is an amenable number.

31320311312020 is an abundant number, since it is smaller than the sum of its proper divisors (37312023042284).

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

31320311312020 is a wasteful number, since it uses less digits than its factorization.

31320311312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68087633319 (or 68087633317 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31320311312020 its reverse (2021311302313), we get a palindrome (33341622614333).

The spelling of 31320311312020 in words is "thirty-one trillion, three hundred twenty billion, three hundred eleven million, three hundred twelve thousand, twenty".