22518193 has 2 divisors, whose sum is σ = 22518194. Its totient is φ = 22518192.

The previous prime is 22518191. The next prime is 22518229. The reversal of 22518193 is 39181522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18766224 + 3751969 = 4332^2 + 1937^2 .

It is a cyclic number.

It is not a de Polignac number, because 22518193 - 2¹ = 22518191 is a prime.

Together with 22518191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22518191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11259096 + 11259097.

It is an arithmetic number, because the mean of its divisors is an integer number (11259097).

Almost surely, 2^22518193 is an apocalyptic number.

It is an amenable number.

22518193 is a deficient number, since it is larger than the sum of its proper divisors (1).

22518193 is an equidigital number, since it uses as much as digits as its factorization.

22518193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 22518193 is about 4745.3338133371. Note that the first 3 decimals coincide. The cubic root of 22518193 is about 282.3868782474.

The spelling of 22518193 in words is "twenty-two million, five hundred eighteen thousand, one hundred ninety-three".