22366891 has 2 divisors, whose sum is σ = 22366892. Its totient is φ = 22366890.

The previous prime is 22366889. The next prime is 22366913. The reversal of 22366891 is 19866322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22366891 - 2¹ = 22366889 is a prime.

Together with 22366889, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22366891.

It is not a weakly prime, because it can be changed into another prime (22366831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11183445 + 11183446.

It is an arithmetic number, because the mean of its divisors is an integer number (11183446).

Almost surely, 2^22366891 is an apocalyptic number.

22366891 is the 2731-st hex number.

22366891 is a deficient number, since it is larger than the sum of its proper divisors (1).

22366891 is an equidigital number, since it uses as much as digits as its factorization.

22366891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 22366891 is about 4729.3647564974. The cubic root of 22366891 is about 281.7529944803.

The spelling of 22366891 in words is "twenty-two million, three hundred sixty-six thousand, eight hundred ninety-one".