31131003232020 has 24 divisors (see below), whose sum is σ = 87166809049824. Its totient is φ = 8301600861856.

The previous prime is 31131003232013. The next prime is 31131003232067. The reversal of 31131003232020 is 2023230013113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259425026874 + ... + 259425026993.

It is an arithmetic number, because the mean of its divisors is an integer number (3631950377076).

Almost surely, 2^{31131003232020} is an apocalyptic number.

31131003232020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31131003232020 is an abundant number, since it is smaller than the sum of its proper divisors (56035805817804).

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

31131003232020 is a wasteful number, since it uses less digits than its factorization.

31131003232020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518850053879 (or 518850053877 counting only the distinct ones).

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

Adding to 31131003232020 its reverse (2023230013113), we get a palindrome (33154233245133).

The spelling of 31131003232020 in words is "thirty-one trillion, one hundred thirty-one billion, three million, two hundred thirty-two thousand, twenty".