18918099 has 12 divisors (see below), whose sum is σ = 27381016. Its totient is φ = 12586752.

The previous prime is 18918079. The next prime is 18918101. The reversal of 18918099 is 99081981.

It is a de Polignac number, because none of the positive numbers 2^k-18918099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18918019) 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 in 11 ways as a sum of consecutive naturals, for example, 3372 + ... + 7014.

Almost surely, 2^18918099 is an apocalyptic number.

18918099 is a deficient number, since it is larger than the sum of its proper divisors (8462917).

18918099 is a wasteful number, since it uses less digits than its factorization.

18918099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4226 (or 4223 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 18918099 is about 4349.4941085142. The cubic root of 18918099 is about 266.4562007744.

The spelling of 18918099 in words is "eighteen million, nine hundred eighteen thousand, ninety-nine".