18445089 has 16 divisors (see below), whose sum is σ = 26734400. Its totient is φ = 11244096.

The previous prime is 18445081. The next prime is 18445109. The reversal of 18445089 is 98054481.

It is not a de Polignac number, because 18445089 - 2³ = 18445081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18445081) 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 15 ways as a sum of consecutive naturals, for example, 2082 + ... + 6420.

It is an arithmetic number, because the mean of its divisors is an integer number (1670900).

Almost surely, 2^18445089 is an apocalyptic number.

It is an amenable number.

18445089 is a deficient number, since it is larger than the sum of its proper divisors (8289311).

18445089 is a wasteful number, since it uses less digits than its factorization.

18445089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 18445089 is about 4294.7746157395. The cubic root of 18445089 is about 264.2166924977.

The spelling of 18445089 in words is "eighteen million, four hundred forty-five thousand, eighty-nine".