20404242424 has 32 divisors (see below), whose sum is σ = 40285702800. Its totient is φ = 9661766400.

The previous prime is 20404242413. The next prime is 20404242427. The reversal of 20404242424 is 42424240402.

It is a super-2 number, since 2×20404242424² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20404242392 and 20404242401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404242427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439524 + ... + 483724.

Almost surely, 2^20404242424 is an apocalyptic number.

It is an amenable number.

20404242424 is a deficient number, since it is larger than the sum of its proper divisors (19881460376).

20404242424 is a wasteful number, since it uses less digits than its factorization.

20404242424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47263 (or 47259 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 20404242424 its reverse (42424240402), we get a palindrome (62828482826).

The spelling of 20404242424 in words is "twenty billion, four hundred four million, two hundred forty-two thousand, four hundred twenty-four".