20311244342020 has 12 divisors (see below), whose sum is σ = 42653613118284. Its totient is φ = 8124497736800.

The previous prime is 20311244342017. The next prime is 20311244342021. The reversal of 20311244342020 is 2024344211302.

It can be written as a sum of positive squares in 2 ways, for example, as 11050092892224 + 9261151449796 = 3324168^2 + 3043214^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20311244342020.

It is not an unprimeable number, because it can be changed into a prime (20311244342021) 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, 507781108531 + ... + 507781108570.

It is an arithmetic number, because the mean of its divisors is an integer number (3554467759857).

Almost surely, 2^{20311244342020} is an apocalyptic number.

20311244342020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311244342020 is an abundant number, since it is smaller than the sum of its proper divisors (22342368776264).

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

20311244342020 is a wasteful number, since it uses less digits than its factorization.

20311244342020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015562217110 (or 1015562217108 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20311244342020 its reverse (2024344211302), we get a palindrome (22335588553322).

The spelling of 20311244342020 in words is "twenty trillion, three hundred eleven billion, two hundred forty-four million, three hundred forty-two thousand, twenty".