20431992839 has 8 divisors (see below), whose sum is σ = 20811829488. Its totient is φ = 20054358720.

The previous prime is 20431992829. The next prime is 20431992853. The reversal of 20431992839 is 93829913402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20431992839 - 2²⁰ = 20430944263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431992829) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 531902 + ... + 569019.

It is an arithmetic number, because the mean of its divisors is an integer number (2601478686).

Almost surely, 2^20431992839 is an apocalyptic number.

20431992839 is a deficient number, since it is larger than the sum of its proper divisors (379836649).

20431992839 is a wasteful number, since it uses less digits than its factorization.

20431992839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101265.

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 20431992839 in words is "twenty billion, four hundred thirty-one million, nine hundred ninety-two thousand, eight hundred thirty-nine".