18344089 has 3 divisors (see below), whose sum is σ = 18348373. Its totient is φ = 18339806.

The previous prime is 18344083. The next prime is 18344093. The reversal of 18344089 is 98044381.

The square root of 18344089 is 4283.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98044381 = 127 ⋅772003.

It is not a de Polignac number, because 18344089 - 2¹¹ = 18342041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18344083) 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 2 ways as a sum of consecutive naturals, for example, 2142 + ... + 6424.

Almost surely, 2^18344089 is an apocalyptic number.

18344089 is the 4283-rd square number.

18344089 is the 2142-nd centered octagonal number.

It is an amenable number.

18344089 is a deficient number, since it is larger than the sum of its proper divisors (4284).

18344089 is an frugal number, since it uses more digits than its factorization.

18344089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8566 (or 4283 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The cubic root of 18344089 is about 263.7335513802.

The spelling of 18344089 in words is "eighteen million, three hundred forty-four thousand, eighty-nine".