20112220020020 has 24 divisors (see below), whose sum is σ = 42239027156424. Its totient is φ = 8044247033856.

The previous prime is 20112220020019. The next prime is 20112220020023. The reversal of 20112220020020 is 2002002221102.

It can be written as a sum of positive squares in 4 ways, for example, as 3399723819556 + 16712496200464 = 1843834^2 + 4088092^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20112220019977 and 20112220020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112220020023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39803549 + ... + 40305668.

It is an arithmetic number, because the mean of its divisors is an integer number (1759959464851).

Almost surely, 2^{20112220020020} is an apocalyptic number.

20112220020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112220020020 is an abundant number, since it is smaller than the sum of its proper divisors (22126807136404).

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

20112220020020 is a wasteful number, since it uses less digits than its factorization.

20112220020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80121779 (or 80121777 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20112220020020 its reverse (2002002221102), we get a palindrome (22114222241122).

The spelling of 20112220020020 in words is "twenty trillion, one hundred twelve billion, two hundred twenty million, twenty thousand, twenty".