231320220323020 has 12 divisors (see below), whose sum is σ = 485772462678384. Its totient is φ = 92528088129200.

The previous prime is 231320220322993. The next prime is 231320220323021. The reversal of 231320220323020 is 20323022023132.

It is not an unprimeable number, because it can be changed into a prime (231320220323021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5783005508056 + ... + 5783005508095.

It is an arithmetic number, because the mean of its divisors is an integer number (40481038556532).

Almost surely, 2^{231320220323020} is an apocalyptic number.

231320220323020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231320220323020 is an abundant number, since it is smaller than the sum of its proper divisors (254452242355364).

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

231320220323020 is a wasteful number, since it uses less digits than its factorization.

231320220323020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11566011016160 (or 11566011016158 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 231320220323020 its reverse (20323022023132), we get a palindrome (251643242346152).

The spelling of 231320220323020 in words is "two hundred thirty-one trillion, three hundred twenty billion, two hundred twenty million, three hundred twenty-three thousand, twenty".