20669167 has 2 divisors, whose sum is σ = 20669168. Its totient is φ = 20669166.

The previous prime is 20669149. The next prime is 20669177. The reversal of 20669167 is 76196602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20669167 - 2⁷ = 20669039 is a prime.

It is a super-3 number, since 3×20669167³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20669107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10334583 + 10334584.

It is an arithmetic number, because the mean of its divisors is an integer number (10334584).

Almost surely, 2^20669167 is an apocalyptic number.

20669167 is a deficient number, since it is larger than the sum of its proper divisors (1).

20669167 is an equidigital number, since it uses as much as digits as its factorization.

20669167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 20669167 is about 4546.3355573473. The cubic root of 20669167 is about 274.4359435713.

The spelling of 20669167 in words is "twenty million, six hundred sixty-nine thousand, one hundred sixty-seven".