20112200020020 has 96 divisors (see below), whose sum is σ = 57042472435200. Its totient is φ = 5293927102464.

The previous prime is 20112200020019. The next prime is 20112200020027. The reversal of 20112200020020 is 2002000221102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20112200019978 and 20112200020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112200020027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16949926 + ... + 18097634.

It is an arithmetic number, because the mean of its divisors is an integer number (594192421200).

Almost surely, 2^{20112200020020} is an apocalyptic number.

20112200020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20112200020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28521236217600).

20112200020020 is an abundant number, since it is smaller than the sum of its proper divisors (36930272415180).

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

20112200020020 is a wasteful number, since it uses less digits than its factorization.

20112200020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151497 (or 1151495 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20112200020020 its reverse (2002000221102), we get a palindrome (22114200241122).

The spelling of 20112200020020 in words is "twenty trillion, one hundred twelve billion, two hundred million, twenty thousand, twenty".