31232330020 has 48 divisors (see below), whose sum is σ = 67011194880. Its totient is φ = 12222048384.

The previous prime is 31232330009. The next prime is 31232330021. The reversal of 31232330020 is 2003323213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31232330020.

It is not an unprimeable number, because it can be changed into a prime (31232330021) 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, 2917117 + ... + 2927803.

It is an arithmetic number, because the mean of its divisors is an integer number (1396066560).

Almost surely, 2^31232330020 is an apocalyptic number.

It is an amenable number.

31232330020 is an abundant number, since it is smaller than the sum of its proper divisors (35778864860).

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

31232330020 is a wasteful number, since it uses less digits than its factorization.

31232330020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13852 (or 13850 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 31232330020 its reverse (2003323213), we get a palindrome (33235653233).

The spelling of 31232330020 in words is "thirty-one billion, two hundred thirty-two million, three hundred thirty thousand, twenty".