20667927167 has 16 divisors (see below), whose sum is σ = 22150402560. Its totient is φ = 19237539552.

The previous prime is 20667927139. The next prime is 20667927173. The reversal of 20667927167 is 76172976602.

It is a cyclic number.

It is not a de Polignac number, because 20667927167 - 2¹⁰ = 20667926143 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 (20667927107) 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, 227198 + ... + 304884.

It is an arithmetic number, because the mean of its divisors is an integer number (1384400160).

Almost surely, 2^20667927167 is an apocalyptic number.

20667927167 is a deficient number, since it is larger than the sum of its proper divisors (1482475393).

20667927167 is a wasteful number, since it uses less digits than its factorization.

20667927167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78022.

The product of its (nonzero) digits is 2667168, while the sum is 53.

The spelling of 20667927167 in words is "twenty billion, six hundred sixty-seven million, nine hundred twenty-seven thousand, one hundred sixty-seven".