420004240424 has 16 divisors (see below), whose sum is σ = 806715462420. Its totient is φ = 204880117120.

The previous prime is 420004240387. The next prime is 420004240541. The reversal of 420004240424 is 424042400024.

It can be written as a sum of positive squares in 2 ways, for example, as 418880784100 + 1123456324 = 647210^2 + 33518^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420004240393 and 420004240402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640250039 + ... + 640250694.

Almost surely, 2^420004240424 is an apocalyptic number.

It is an amenable number.

420004240424 is a deficient number, since it is larger than the sum of its proper divisors (386711221996).

420004240424 is a wasteful number, since it uses less digits than its factorization.

420004240424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280500780 (or 1280500776 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 420004240424 its reverse (424042400024), we get a palindrome (844046640448).

The spelling of 420004240424 in words is "four hundred twenty billion, four million, two hundred forty thousand, four hundred twenty-four".