18363799 has 2 divisors, whose sum is σ = 18363800. Its totient is φ = 18363798.

The previous prime is 18363797. The next prime is 18363817. The reversal of 18363799 is 99736381.

It is a weak prime.

It is an emirp because it is prime and its reverse (99736381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18363799 - 2¹ = 18363797 is a prime.

It is a super-2 number, since 2×18363799² = 674458227424802, which contains 22 as substring.

Together with 18363797, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18363797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9181899 + 9181900.

It is an arithmetic number, because the mean of its divisors is an integer number (9181900).

Almost surely, 2^18363799 is an apocalyptic number.

18363799 is a deficient number, since it is larger than the sum of its proper divisors (1).

18363799 is an equidigital number, since it uses as much as digits as its factorization.

18363799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 18363799 is about 4285.3003395328. The cubic root of 18363799 is about 263.8279746693.

The spelling of 18363799 in words is "eighteen million, three hundred sixty-three thousand, seven hundred ninety-nine".