18119499 has 12 divisors (see below), whose sum is σ = 24769848. Its totient is φ = 11781760.

The previous prime is 18119489. The next prime is 18119509. The reversal of 18119499 is 99491181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18119489) and next prime (18119509).

It is not a de Polignac number, because 18119499 - 2¹² = 18115403 is a prime.

It is a super-2 number, since 2×18119499² = 656632488022002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18119499.

It is not an unprimeable number, because it can be changed into a prime (18119489) 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 in 11 ways as a sum of consecutive naturals, for example, 3247 + ... + 6839.

It is an arithmetic number, because the mean of its divisors is an integer number (2064154).

Almost surely, 2^18119499 is an apocalyptic number.

18119499 is a deficient number, since it is larger than the sum of its proper divisors (6650349).

18119499 is an equidigital number, since it uses as much as digits as its factorization.

18119499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3678 (or 3637 counting only the distinct ones).

The product of its digits is 23328, while the sum is 42.

The square root of 18119499 is about 4256.7004827683. The cubic root of 18119499 is about 262.6528162351.

The spelling of 18119499 in words is "eighteen million, one hundred nineteen thousand, four hundred ninety-nine".