20839916727 has 36 divisors (see below), whose sum is σ = 35028878040. Its totient is φ = 11904393312.

The previous prime is 20839916689. The next prime is 20839916743. The reversal of 20839916727 is 72761993802.

It is not a de Polignac number, because 20839916727 - 2¹⁴ = 20839900343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20839915727) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1639924 + ... + 1652582.

It is an arithmetic number, because the mean of its divisors is an integer number (973024390).

Almost surely, 2^20839916727 is an apocalyptic number.

20839916727 is a deficient number, since it is larger than the sum of its proper divisors (14188961313).

20839916727 is a wasteful number, since it uses less digits than its factorization.

20839916727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16412 (or 16402 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 20839916727 in words is "twenty billion, eight hundred thirty-nine million, nine hundred sixteen thousand, seven hundred twenty-seven".