311232020020 has 24 divisors (see below), whose sum is σ = 656973712584. Its totient is φ = 123847766016.

The previous prime is 311232019999. The next prime is 311232020053. The reversal of 311232020020 is 20020232113.

It can be written as a sum of positive squares in 4 ways, for example, as 1199098384 + 310032921636 = 34628^2 + 556806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 311232019976 and 311232020003.

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 7 ways as a sum of consecutive naturals, for example, 40311169 + ... + 40318888.

It is an arithmetic number, because the mean of its divisors is an integer number (27373904691).

Almost surely, 2^311232020020 is an apocalyptic number.

It is an amenable number.

311232020020 is an abundant number, since it is smaller than the sum of its proper divisors (345741692564).

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

311232020020 is a wasteful number, since it uses less digits than its factorization.

311232020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80630259 (or 80630257 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 311232020020 its reverse (20020232113), we get a palindrome (331252252133).

The spelling of 311232020020 in words is "three hundred eleven billion, two hundred thirty-two million, twenty thousand, twenty".