202020420 has 48 divisors (see below), whose sum is σ = 646466688. Its totient is φ = 46176000.

The previous prime is 202020359. The next prime is 202020421. The reversal of 202020420 is 24020202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 202020396 and 202020405.

It is not an unprimeable number, because it can be changed into a prime (202020421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240081 + ... + 240920.

It is an arithmetic number, because the mean of its divisors is an integer number (13468056).

Almost surely, 2^202020420 is an apocalyptic number.

202020420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202020420 is an abundant number, since it is smaller than the sum of its proper divisors (444446268).

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

202020420 is a wasteful number, since it uses less digits than its factorization.

202020420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481020 (or 481018 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 202020420 is about 14213.3887584911. The cubic root of 202020420 is about 586.7662014027.

Adding to 202020420 its reverse (24020202), we get a palindrome (226040622).

The spelling of 202020420 in words is "two hundred two million, twenty thousand, four hundred twenty".