22418791 has 2 divisors, whose sum is σ = 22418792. Its totient is φ = 22418790.

The previous prime is 22418789. The next prime is 22418821. The reversal of 22418791 is 19781422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22418791 - 2¹ = 22418789 is a prime.

Together with 22418789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22418731) 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, 11209395 + 11209396.

It is an arithmetic number, because the mean of its divisors is an integer number (11209396).

Almost surely, 2^22418791 is an apocalyptic number.

22418791 is a deficient number, since it is larger than the sum of its proper divisors (1).

22418791 is an equidigital number, since it uses as much as digits as its factorization.

22418791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 22418791 is about 4734.8485720242. The cubic root of 22418791 is about 281.9707521265.

The spelling of 22418791 in words is "twenty-two million, four hundred eighteen thousand, seven hundred ninety-one".