202102202020 has 24 divisors (see below), whose sum is σ = 425596852800. Its totient is φ = 80615694432.

The previous prime is 202102202017. The next prime is 202102202023. The reversal of 202102202020 is 20202201202.

It is an interprime number because it is at equal distance from previous prime (202102202017) and next prime (202102202023).

It is a super-2 number, since 2×202102202020² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202102202023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14066790 + ... + 14081149.

It is an arithmetic number, because the mean of its divisors is an integer number (17733202200).

Almost surely, 2^202102202020 is an apocalyptic number.

202102202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202102202020 is an abundant number, since it is smaller than the sum of its proper divisors (223494650780).

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

202102202020 is a wasteful number, since it uses less digits than its factorization.

202102202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28148307 (or 28148305 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 202102202020 its reverse (20202201202), we get a palindrome (222304403222).

The spelling of 202102202020 in words is "two hundred two billion, one hundred two million, two hundred two thousand, twenty".