18235799 has 2 divisors, whose sum is σ = 18235800. Its totient is φ = 18235798.

The previous prime is 18235793. The next prime is 18235813. The reversal of 18235799 is 99753281.

It is a weak prime.

It is an emirp because it is prime and its reverse (99753281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18235799 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18235793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9117899 + 9117900.

It is an arithmetic number, because the mean of its divisors is an integer number (9117900).

Almost surely, 2^18235799 is an apocalyptic number.

18235799 is a deficient number, since it is larger than the sum of its proper divisors (1).

18235799 is an equidigital number, since it uses as much as digits as its factorization.

18235799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 18235799 is about 4270.3394478659. The cubic root of 18235799 is about 263.2135639007.

The spelling of 18235799 in words is "eighteen million, two hundred thirty-five thousand, seven hundred ninety-nine".