20309558927 has 16 divisors (see below), whose sum is σ = 23302397952. Its totient is φ = 17339713440.

The previous prime is 20309558909. The next prime is 20309559013. The reversal of 20309558927 is 72985590302.

It is not a de Polignac number, because 20309558927 - 2⁸ = 20309558671 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 (20309554927) 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, 2196488 + ... + 2205714.

It is an arithmetic number, because the mean of its divisors is an integer number (1456399872).

Almost surely, 2^20309558927 is an apocalyptic number.

20309558927 is a deficient number, since it is larger than the sum of its proper divisors (2992839025).

20309558927 is an equidigital number, since it uses as much as digits as its factorization.

20309558927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10438.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 20309558927 in words is "twenty billion, three hundred nine million, five hundred fifty-eight thousand, nine hundred twenty-seven".