20304432424 has 8 divisors (see below), whose sum is σ = 38070810810. Its totient is φ = 10152216208.

The previous prime is 20304432347. The next prime is 20304432427. The reversal of 20304432424 is 42423440302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19872540900 + 431891524 = 140970^2 + 20782^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20304432392 and 20304432401.

It is not an unprimeable number, because it can be changed into a prime (20304432427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269027019 + ... + 1269027034.

Almost surely, 2^20304432424 is an apocalyptic number.

It is an amenable number.

20304432424 is a deficient number, since it is larger than the sum of its proper divisors (17766378386).

20304432424 is a wasteful number, since it uses less digits than its factorization.

20304432424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538054059 (or 2538054055 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 20304432424 its reverse (42423440302), we get a palindrome (62727872726).

The spelling of 20304432424 in words is "twenty billion, three hundred four million, four hundred thirty-two thousand, four hundred twenty-four".