18768499 has 2 divisors, whose sum is σ = 18768500. Its totient is φ = 18768498.

The previous prime is 18768479. The next prime is 18768517. The reversal of 18768499 is 99486781.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18768499 - 2¹⁹ = 18244211 is a prime.

It is not a weakly prime, because it can be changed into another prime (18768479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9384249 + 9384250.

It is an arithmetic number, because the mean of its divisors is an integer number (9384250).

Almost surely, 2^18768499 is an apocalyptic number.

18768499 is a deficient number, since it is larger than the sum of its proper divisors (1).

18768499 is an equidigital number, since it uses as much as digits as its factorization.

18768499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 18768499 is about 4332.2625728365. The cubic root of 18768499 is about 265.7519830042.

It can be divided in two parts, 187 and 68499, that added together give a palindrome (68686).

The spelling of 18768499 in words is "eighteen million, seven hundred sixty-eight thousand, four hundred ninety-nine".