22605041891 has 2 divisors, whose sum is σ = 22605041892. Its totient is φ = 22605041890.

The previous prime is 22605041863. The next prime is 22605041917. The reversal of 22605041891 is 19814050622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22605041891 - 2⁶ = 22605041827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22605040891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11302520945 + 11302520946.

It is an arithmetic number, because the mean of its divisors is an integer number (11302520946).

Almost surely, 2^22605041891 is an apocalyptic number.

22605041891 is a deficient number, since it is larger than the sum of its proper divisors (1).

22605041891 is an equidigital number, since it uses as much as digits as its factorization.

22605041891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 22605041891 in words is "twenty-two billion, six hundred five million, forty-one thousand, eight hundred ninety-one".