31311232003020 has 48 divisors (see below), whose sum is σ = 87863290931808. Its totient is φ = 8331391265280.

The previous prime is 31311232002997. The next prime is 31311232003027. The reversal of 31311232003020 is 2030023211313.

It is not an unprimeable number, because it can be changed into a prime (31311232003027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570928671 + ... + 570983510.

It is an arithmetic number, because the mean of its divisors is an integer number (1830485227746).

Almost surely, 2^{31311232003020} is an apocalyptic number.

31311232003020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31311232003020 is an abundant number, since it is smaller than the sum of its proper divisors (56552058928788).

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

31311232003020 is a wasteful number, since it uses less digits than its factorization.

31311232003020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141912650 (or 1141912648 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31311232003020 its reverse (2030023211313), we get a palindrome (33341255214333).

The spelling of 31311232003020 in words is "thirty-one trillion, three hundred eleven billion, two hundred thirty-two million, three thousand, twenty".