20210022100020 has 48 divisors (see below), whose sum is σ = 56590807150080. Its totient is φ = 5389077772416.

The previous prime is 20210022099991. The next prime is 20210022100043. The reversal of 20210022100020 is 2000122001202.

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 = 20210022099969 and 20210022100005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6921787 + ... + 9398466.

It is an arithmetic number, because the mean of its divisors is an integer number (1178975148960).

Almost surely, 2^{20210022100020} is an apocalyptic number.

20210022100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210022100020 is an abundant number, since it is smaller than the sum of its proper divisors (36380785050060).

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

20210022100020 is a wasteful number, since it uses less digits than its factorization.

20210022100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16340904 (or 16340902 counting only the distinct ones).

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

Adding to 20210022100020 its reverse (2000122001202), we get a palindrome (22210144101222).

The spelling of 20210022100020 in words is "twenty trillion, two hundred ten billion, twenty-two million, one hundred thousand, twenty".