20424436434 has 24 divisors (see below), whose sum is σ = 44259012252. Its totient is φ = 6807212160.

The previous prime is 20424436421. The next prime is 20424436453. The reversal of 20424436434 is 43463442402.

20424436434 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 4 + 4 + 3 + 643 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18570875625 + 1853560809 = 136275^2 + 43053^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64174 + ... + 212054.

Almost surely, 2^20424436434 is an apocalyptic number.

20424436434 is an abundant number, since it is smaller than the sum of its proper divisors (23834575818).

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

20424436434 is a wasteful number, since it uses less digits than its factorization.

20424436434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155562 (or 155559 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 20424436434 its reverse (43463442402), we get a palindrome (63887878836).

The spelling of 20424436434 in words is "twenty billion, four hundred twenty-four million, four hundred thirty-six thousand, four hundred thirty-four".