18019089 has 12 divisors (see below), whose sum is σ = 28393872. Its totient is φ = 10920600.

The previous prime is 18019081. The next prime is 18019103. The reversal of 18019089 is 98091081.

It is not a de Polignac number, because 18019089 - 2³ = 18019081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18019081) 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, 90907 + ... + 91104.

It is an arithmetic number, because the mean of its divisors is an integer number (2366156).

Almost surely, 2^18019089 is an apocalyptic number.

It is an amenable number.

18019089 is a deficient number, since it is larger than the sum of its proper divisors (10374783).

18019089 is a wasteful number, since it uses less digits than its factorization.

18019089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182028 (or 182025 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 18019089 is about 4244.8897512185. The cubic root of 18019089 is about 262.1667498991.

The spelling of 18019089 in words is "eighteen million, nineteen thousand, eighty-nine".