20102120020020 has 48 divisors (see below), whose sum is σ = 56293005827520. Its totient is φ = 5359892027136.

The previous prime is 20102120020007. The next prime is 20102120020057. The reversal of 20102120020020 is 2002002120102.

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 = 20102120019978 and 20102120020005.

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, 20559225 + ... + 21514784.

It is an arithmetic number, because the mean of its divisors is an integer number (1172770954740).

Almost surely, 2^{20102120020020} is an apocalyptic number.

20102120020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102120020020 is an abundant number, since it is smaller than the sum of its proper divisors (36190885807500).

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

20102120020020 is a wasteful number, since it uses less digits than its factorization.

20102120020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42081984 (or 42081982 counting only the distinct ones).

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

Adding to 20102120020020 its reverse (2002002120102), we get a palindrome (22104122140122).

The spelling of 20102120020020 in words is "twenty trillion, one hundred two billion, one hundred twenty million, twenty thousand, twenty".