20697167 has 2 divisors, whose sum is σ = 20697168. Its totient is φ = 20697166.

The previous prime is 20697151. The next prime is 20697199. The reversal of 20697167 is 76179602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20697167 - 2⁴ = 20697151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20697167.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20697107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10348583 + 10348584.

It is an arithmetic number, because the mean of its divisors is an integer number (10348584).

Almost surely, 2^20697167 is an apocalyptic number.

20697167 is a deficient number, since it is larger than the sum of its proper divisors (1).

20697167 is an equidigital number, since it uses as much as digits as its factorization.

20697167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 20697167 is about 4549.4139182976. The cubic root of 20697167 is about 274.5598114750.

The spelling of 20697167 in words is "twenty million, six hundred ninety-seven thousand, one hundred sixty-seven".