420202020424 has 64 divisors (see below), whose sum is σ = 820139871600. Its totient is φ = 201717694464.

The previous prime is 420202020401. The next prime is 420202020457. The reversal of 420202020424 is 424020202024.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 78690348324 + 341511672100 = 280518^2 + 584390^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420202020395 and 420202020404.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3602994 + ... + 3717790.

Almost surely, 2^420202020424 is an apocalyptic number.

It is an amenable number.

420202020424 is a deficient number, since it is larger than the sum of its proper divisors (399937851176).

420202020424 is a wasteful number, since it uses less digits than its factorization.

420202020424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115042 (or 115038 counting only the distinct ones).

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

Adding to 420202020424 its reverse (424020202024), we get a palindrome (844222222448).

The spelling of 420202020424 in words is "four hundred twenty billion, two hundred two million, twenty thousand, four hundred twenty-four".