20243642872 has 16 divisors (see below), whose sum is σ = 39954558600. Its totient is φ = 9589093920.

The previous prime is 20243642863. The next prime is 20243642927. The reversal of 20243642872 is 27824634202.

It is a congruent number.

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, 66590779 + ... + 66591082.

Almost surely, 2^20243642872 is an apocalyptic number.

It is an amenable number.

20243642872 is a deficient number, since it is larger than the sum of its proper divisors (19710915728).

20243642872 is a wasteful number, since it uses less digits than its factorization.

20243642872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133181886 (or 133181882 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 40.

The spelling of 20243642872 in words is "twenty billion, two hundred forty-three million, six hundred forty-two thousand, eight hundred seventy-two".