20111120220020 has 96 divisors (see below), whose sum is σ = 44674292275200. Its totient is φ = 7583695645824.

The previous prime is 20111120219893. The next prime is 20111120220029. The reversal of 20111120220020 is 2002202111102.

It is a junction number, because it is equal to n+sod(n) for n = 20111120219977 and 20111120220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111120220029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175826969 + ... + 175941311.

It is an arithmetic number, because the mean of its divisors is an integer number (465357211200).

Almost surely, 2^{20111120220020} is an apocalyptic number.

20111120220020 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 20111120220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22337146137600).

20111120220020 is an abundant number, since it is smaller than the sum of its proper divisors (24563172055180).

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

20111120220020 is a wasteful number, since it uses less digits than its factorization.

20111120220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116637 (or 116635 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20111120220020 its reverse (2002202111102), we get a palindrome (22113322331122).

The spelling of 20111120220020 in words is "twenty trillion, one hundred eleven billion, one hundred twenty million, two hundred twenty thousand, twenty".