2102000020020 has 72 divisors (see below), whose sum is σ = 6426272047104. Its totient is φ = 556119684288.

The previous prime is 2102000020013. The next prime is 2102000020031. The reversal of 2102000020020 is 200200002012.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2102000019984 and 2102000020011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45952644 + ... + 45998363.

It is an arithmetic number, because the mean of its divisors is an integer number (89253778432).

Almost surely, 2^{2102000020020} is an apocalyptic number.

2102000020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102000020020 is an abundant number, since it is smaller than the sum of its proper divisors (4324272027084).

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

2102000020020 is a wasteful number, since it uses less digits than its factorization.

2102000020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91951149 (or 91951144 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 2102000020020 its reverse (200200002012), we get a palindrome (2302200022032).

The spelling of 2102000020020 in words is "two trillion, one hundred two billion, twenty thousand, twenty".