202120002020 has 24 divisors (see below), whose sum is σ = 425035875264. Its totient is φ = 80736787296.

The previous prime is 202120001999. The next prime is 202120002053. The reversal of 202120002020 is 20200021202.

It is a junction number, because it is equal to n+sod(n) for n = 202120001992 and 202120002010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6935942 + ... + 6965021.

It is an arithmetic number, because the mean of its divisors is an integer number (17709828136).

Almost surely, 2^202120002020 is an apocalyptic number.

202120002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120002020 is an abundant number, since it is smaller than the sum of its proper divisors (222915873244).

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

202120002020 is a wasteful number, since it uses less digits than its factorization.

202120002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13901699 (or 13901697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 202120002020 its reverse (20200021202), we get a palindrome (222320023222).

The spelling of 202120002020 in words is "two hundred two billion, one hundred twenty million, two thousand, twenty".