21106674167167 has 6 divisors (see below), whose sum is σ = 22064254848272. Its totient is φ = 20188992681132.

The previous prime is 21106674167107. The next prime is 21106674167177. The reversal of 21106674167167 is 76176147660112.

It is not a de Polignac number, because 21106674167167 - 2⁷ = 21106674167039 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 (21106674167107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19949596983 + ... + 19949598040.

Almost surely, 2^{21106674167167} is an apocalyptic number.

21106674167167 is a deficient number, since it is larger than the sum of its proper divisors (957580681105).

21106674167167 is an equidigital number, since it uses as much as digits as its factorization.

21106674167167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39899195069 (or 39899195046 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 55.

The spelling of 21106674167167 in words is "twenty-one trillion, one hundred six billion, six hundred seventy-four million, one hundred sixty-seven thousand, one hundred sixty-seven".