202020102020 has 72 divisors (see below), whose sum is σ = 468408175872. Its totient is φ = 73132234560.

The previous prime is 202020102007. The next prime is 202020102047. The reversal of 202020102020 is 20201020202.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is a junction number, because it is equal to n+sod(n) for n = 202020101992 and 202020102010.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 352487 + ... + 726833.

Almost surely, 2^202020102020 is an apocalyptic number.

202020102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202020102020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234204087936).

202020102020 is an abundant number, since it is smaller than the sum of its proper divisors (266388073852).

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

202020102020 is a wasteful number, since it uses less digits than its factorization.

202020102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374601 (or 374588 counting only the distinct ones).

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

Adding to 202020102020 its reverse (20201020202), we get a palindrome (222221122222).

The spelling of 202020102020 in words is "two hundred two billion, twenty million, one hundred two thousand, twenty".