20127138807 has 16 divisors (see below), whose sum is σ = 27093854592. Its totient is φ = 13289321760.

The previous prime is 20127138791. The next prime is 20127138817. The reversal of 20127138807 is 70883172102.

It is not a de Polignac number, because 20127138807 - 2⁴ = 20127138791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20127138817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2341257 + ... + 2349837.

It is an arithmetic number, because the mean of its divisors is an integer number (1693365912).

Almost surely, 2^20127138807 is an apocalyptic number.

20127138807 is a deficient number, since it is larger than the sum of its proper divisors (6966715785).

20127138807 is a wasteful number, since it uses less digits than its factorization.

20127138807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15998.

The product of its (nonzero) digits is 37632, while the sum is 39.

The spelling of 20127138807 in words is "twenty billion, one hundred twenty-seven million, one hundred thirty-eight thousand, eight hundred seven".