18395393 has 2 divisors, whose sum is σ = 18395394. Its totient is φ = 18395392.

The previous prime is 18395359. The next prime is 18395407. The reversal of 18395393 is 39359381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9443329 + 8952064 = 3073^2 + 2992^2 .

It is a cyclic number.

It is not a de Polignac number, because 18395393 - 2⁸ = 18395137 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18395393.

It is not a weakly prime, because it can be changed into another prime (18395303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9197696 + 9197697.

It is an arithmetic number, because the mean of its divisors is an integer number (9197697).

Almost surely, 2^18395393 is an apocalyptic number.

It is an amenable number.

18395393 is a deficient number, since it is larger than the sum of its proper divisors (1).

18395393 is an equidigital number, since it uses as much as digits as its factorization.

18395393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 41.

The square root of 18395393 is about 4288.9850780808. The cubic root of 18395393 is about 263.9791889396.

The spelling of 18395393 in words is "eighteen million, three hundred ninety-five thousand, three hundred ninety-three".