31020020311320 has 80 divisors (see below), whose sum is σ = 104261734946160. Its totient is φ = 8272005415488.

The previous prime is 31020020311303. The next prime is 31020020311339. The reversal of 31020020311320 is 2311302002013.

31020020311320 is a `hidden beast` number, since 3 + 10 + 2 + 0 + 0 + 20 + 311 + 320 = 666.

It is a super-2 number, since 2×31020020311320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31020020311293 and 31020020311302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4787036932 + ... + 4787043411.

It is an arithmetic number, because the mean of its divisors is an integer number (1303271686827).

Almost surely, 2^{31020020311320} is an apocalyptic number.

31020020311320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31020020311320 is an abundant number, since it is smaller than the sum of its proper divisors (73241714634840).

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

31020020311320 is a wasteful number, since it uses less digits than its factorization.

31020020311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9574080366 (or 9574080353 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31020020311320 its reverse (2311302002013), we get a palindrome (33331322313333).

The spelling of 31020020311320 in words is "thirty-one trillion, twenty billion, twenty million, three hundred eleven thousand, three hundred twenty".