18468719 has 2 divisors, whose sum is σ = 18468720. Its totient is φ = 18468718.

The previous prime is 18468713. The next prime is 18468763. The reversal of 18468719 is 91786481.

It is an a-pointer prime, because the next prime (18468763) can be obtained adding 18468719 to its sum of digits (44).

It is a weak prime.

It is an emirp because it is prime and its reverse (91786481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18468719 is a prime.

It is a super-2 number, since 2×18468719² = 682187163001922, which contains 22 as substring.

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 18468719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18468713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9234359 + 9234360.

It is an arithmetic number, because the mean of its divisors is an integer number (9234360).

Almost surely, 2^18468719 is an apocalyptic number.

18468719 is a deficient number, since it is larger than the sum of its proper divisors (1).

18468719 is an equidigital number, since it uses as much as digits as its factorization.

18468719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The square root of 18468719 is about 4297.5247526919. The cubic root of 18468719 is about 264.3294736682.

It can be divided in two parts, 184687 and 19, that multiplied together give a palindrome (3509053).

The spelling of 18468719 in words is "eighteen million, four hundred sixty-eight thousand, seven hundred nineteen".