202020424420 has 24 divisors (see below), whose sum is σ = 424251334584. Its totient is φ = 80806561536.

The previous prime is 202020424391. The next prime is 202020424421. The reversal of 202020424420 is 24424020202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30857840896 + 171162583524 = 175664^2 + 413718^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202020424391 and 202020424400.

It is not an unprimeable number, because it can be changed into a prime (202020424421) 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, 1929334 + ... + 2031346.

It is an arithmetic number, because the mean of its divisors is an integer number (17677138941).

Almost surely, 2^202020424420 is an apocalyptic number.

202020424420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202020424420 is an abundant number, since it is smaller than the sum of its proper divisors (222230910164).

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

202020424420 is a wasteful number, since it uses less digits than its factorization.

202020424420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201039 (or 201037 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 202020424420 its reverse (24424020202), we get a palindrome (226444444622).

The spelling of 202020424420 in words is "two hundred two billion, twenty million, four hundred twenty-four thousand, four hundred twenty".