22364891 has 2 divisors, whose sum is σ = 22364892. Its totient is φ = 22364890.

The previous prime is 22364879. The next prime is 22364917. The reversal of 22364891 is 19846322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22364891 - 2¹⁰ = 22363867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22364851) 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, 11182445 + 11182446.

It is an arithmetic number, because the mean of its divisors is an integer number (11182446).

Almost surely, 2^22364891 is an apocalyptic number.

22364891 is a deficient number, since it is larger than the sum of its proper divisors (1).

22364891 is an equidigital number, since it uses as much as digits as its factorization.

22364891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 22364891 is about 4729.1533068827. The cubic root of 22364891 is about 281.7445963114.

Subtracting from 22364891 its reverse (19846322), we obtain a square (2518569 = 1587²).

The spelling of 22364891 in words is "twenty-two million, three hundred sixty-four thousand, eight hundred ninety-one".