20434536568 has 16 divisors (see below), whose sum is σ = 39635955000. Its totient is φ = 9864948576.

The previous prime is 20434536517. The next prime is 20434536587. The reversal of 20434536568 is 86563543402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44039718 + ... + 44040181.

Almost surely, 2^20434536568 is an apocalyptic number.

It is an amenable number.

20434536568 is a deficient number, since it is larger than the sum of its proper divisors (19201418432).

20434536568 is a wasteful number, since it uses less digits than its factorization.

20434536568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88079934 (or 88079930 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 20434536568 in words is "twenty billion, four hundred thirty-four million, five hundred thirty-six thousand, five hundred sixty-eight".