20020021100220 has 96 divisors (see below), whose sum is σ = 58237907757120. Its totient is φ = 5132457379840.

The previous prime is 20020021100201. The next prime is 20020021100227. The reversal of 20020021100220 is 2200112002002.

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 = 20020021100196 and 20020021100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020021100227) 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, 24285051 + ... + 25095890.

It is an arithmetic number, because the mean of its divisors is an integer number (606644872470).

Almost surely, 2^{20020021100220} is an apocalyptic number.

20020021100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020021100220 is an abundant number, since it is smaller than the sum of its proper divisors (38217886656900).

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

20020021100220 is a wasteful number, since it uses less digits than its factorization.

20020021100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49381215 (or 49381213 counting only the distinct ones).

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

Adding to 20020021100220 its reverse (2200112002002), we get a palindrome (22220133102222).

The spelling of 20020021100220 in words is "twenty trillion, twenty billion, twenty-one million, one hundred thousand, two hundred twenty".