22118399 has 2 divisors, whose sum is σ = 22118400. Its totient is φ = 22118398.

The previous prime is 22118363. The next prime is 22118401. The reversal of 22118399 is 99381122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22118399 - 2⁸ = 22118143 is a prime.

It is a Sophie Germain prime.

Together with 22118401, 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 (22118339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11059199 + 11059200.

It is an arithmetic number, because the mean of its divisors is an integer number (11059200).

Almost surely, 2^22118399 is an apocalyptic number.

22118399 is a deficient number, since it is larger than the sum of its proper divisors (1).

22118399 is an equidigital number, since it uses as much as digits as its factorization.

22118399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 22118399 is about 4703.0201998290. The cubic root of 22118399 is about 280.7056986381.

The spelling of 22118399 in words is "twenty-two million, one hundred eighteen thousand, three hundred ninety-nine".