20566367 has 2 divisors, whose sum is σ = 20566368. Its totient is φ = 20566366.

The previous prime is 20566331. The next prime is 20566369. The reversal of 20566367 is 76366502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20566367 - 2¹⁸ = 20304223 is a prime.

Together with 20566369, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20566369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10283183 + 10283184.

It is an arithmetic number, because the mean of its divisors is an integer number (10283184).

Almost surely, 2^20566367 is an apocalyptic number.

20566367 is a deficient number, since it is larger than the sum of its proper divisors (1).

20566367 is an equidigital number, since it uses as much as digits as its factorization.

20566367 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 20566367 is about 4535.0156559818. The cubic root of 20566367 is about 273.9802097344.

The spelling of 20566367 in words is "twenty million, five hundred sixty-six thousand, three hundred sixty-seven".