20736774727 has 16 divisors (see below), whose sum is σ = 22023039232. Its totient is φ = 19491010560.

The previous prime is 20736774719. The next prime is 20736774733. The reversal of 20736774727 is 72747763702.

It is a cyclic number.

It is not a de Polignac number, because 20736774727 - 2³ = 20736774719 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 (20736774827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646153 + ... + 677485.

It is an arithmetic number, because the mean of its divisors is an integer number (1376439952).

Almost surely, 2^20736774727 is an apocalyptic number.

20736774727 is a deficient number, since it is larger than the sum of its proper divisors (1286264505).

20736774727 is a wasteful number, since it uses less digits than its factorization.

20736774727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31978.

The product of its (nonzero) digits is 4840416, while the sum is 52.

The spelling of 20736774727 in words is "twenty billion, seven hundred thirty-six million, seven hundred seventy-four thousand, seven hundred twenty-seven".