20201100000020 has 48 divisors (see below), whose sum is σ = 42443843920128. Its totient is φ = 8076338993280.

The previous prime is 20201099999897. The next prime is 20201100000047. The reversal of 20201100000020 is 2000000110202.

It is a junction number, because it is equal to n+sod(n) for n = 20201099999953 and 20201100000007.

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, 902589230 + ... + 902611610.

It is an arithmetic number, because the mean of its divisors is an integer number (884246748336).

Almost surely, 2^{20201100000020} is an apocalyptic number.

20201100000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201100000020 is an abundant number, since it is smaller than the sum of its proper divisors (22242743920108).

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

20201100000020 is a wasteful number, since it uses less digits than its factorization.

20201100000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43280 (or 43278 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 20201100000020 its reverse (2000000110202), we get a palindrome (22201100110222).

The spelling of 20201100000020 in words is "twenty trillion, two hundred one billion, one hundred million, twenty", and thus it is an aban number.