20668272167 has 18 divisors (see below), whose sum is σ = 22308110424. Its totient is φ = 19112136120.

The previous prime is 20668272151. The next prime is 20668272179. The reversal of 20668272167 is 76127286602.

It is not a de Polignac number, because 20668272167 - 2⁴ = 20668272151 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 (20668272197) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21373118 + ... + 21374084.

It is an arithmetic number, because the mean of its divisors is an integer number (1239339468).

Almost surely, 2^20668272167 is an apocalyptic number.

20668272167 is a deficient number, since it is larger than the sum of its proper divisors (1639838257).

20668272167 is an frugal number, since it uses more digits than its factorization.

20668272167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 20668272167 in words is "twenty billion, six hundred sixty-eight million, two hundred seventy-two thousand, one hundred sixty-seven".