20011112020020 has 192 divisors, whose sum is σ = 62552143374336. Its totient is φ = 4737922398720.

The previous prime is 20011112020001. The next prime is 20011112020027. The reversal of 20011112020020 is 2002021111002.

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 = 20011112019978 and 20011112020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011112020027) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 388411302 + ... + 388462818.

It is an arithmetic number, because the mean of its divisors is an integer number (325792413408).

Almost surely, 2^{20011112020020} is an apocalyptic number.

20011112020020 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 20011112020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31276071687168).

20011112020020 is an abundant number, since it is smaller than the sum of its proper divisors (42541031354316).

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

20011112020020 is a wasteful number, since it uses less digits than its factorization.

20011112020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65270 (or 65268 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20011112020020 its reverse (2002021111002), we get a palindrome (22013133131022).

The spelling of 20011112020020 in words is "twenty trillion, eleven billion, one hundred twelve million, twenty thousand, twenty".