202103210020 has 24 divisors (see below), whose sum is σ = 425619069624. Its totient is φ = 80612269056.

The previous prime is 202103210017. The next prime is 202103210021. The reversal of 202103210020 is 20012301202.

It can be written as a sum of positive squares in 4 ways, for example, as 40301365504 + 161801844516 = 200752^2 + 402246^2 .

It is not an unprimeable number, because it can be changed into a prime (202103210021) 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, 14306199 + ... + 14320318.

It is an arithmetic number, because the mean of its divisors is an integer number (17734127901).

Almost surely, 2^202103210020 is an apocalyptic number.

202103210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202103210020 is an abundant number, since it is smaller than the sum of its proper divisors (223515859604).

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

202103210020 is a wasteful number, since it uses less digits than its factorization.

202103210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28626879 (or 28626877 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 202103210020 its reverse (20012301202), we get a palindrome (222115511222).

The spelling of 202103210020 in words is "two hundred two billion, one hundred three million, two hundred ten thousand, twenty".