20200131220 has 48 divisors (see below), whose sum is σ = 42646156560. Its totient is φ = 8037098496.

The previous prime is 20200131191. The next prime is 20200131229. The reversal of 20200131220 is 2213100202.

It can be written as a sum of positive squares in 8 ways, for example, as 7591985424 + 12608145796 = 87132^2 + 112286^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20200131220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200131229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9126834 + ... + 9129046.

It is an arithmetic number, because the mean of its divisors is an integer number (888461595).

Almost surely, 2^20200131220 is an apocalyptic number.

20200131220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20200131220 is an abundant number, since it is smaller than the sum of its proper divisors (22446025340).

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

20200131220 is a wasteful number, since it uses less digits than its factorization.

20200131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444 (or 4442 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20200131220 its reverse (2213100202), we get a palindrome (22413231422).

The spelling of 20200131220 in words is "twenty billion, two hundred million, one hundred thirty-one thousand, two hundred twenty".