20313231303220 has 96 divisors (see below), whose sum is σ = 43027514812800. Its totient is φ = 8055142723584.

The previous prime is 20313231303203. The next prime is 20313231303257. The reversal of 20313231303220 is 2230313231302.

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 31 ways as a sum of consecutive naturals, for example, 2849376616 + ... + 2849383744.

It is an arithmetic number, because the mean of its divisors is an integer number (448203279300).

Almost surely, 2^{20313231303220} is an apocalyptic number.

20313231303220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20313231303220 is an abundant number, since it is smaller than the sum of its proper divisors (22714283509580).

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

20313231303220 is a wasteful number, since it uses less digits than its factorization.

20313231303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9377 (or 9375 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 20313231303220 its reverse (2230313231302), we get a palindrome (22543544534522).

The spelling of 20313231303220 in words is "twenty trillion, three hundred thirteen billion, two hundred thirty-one million, three hundred three thousand, two hundred twenty".