18450089 has 4 divisors (see below), whose sum is σ = 21085824. Its totient is φ = 15814356.

The previous prime is 18450059. The next prime is 18450101. The reversal of 18450089 is 98005481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18450089 - 2⁸ = 18449833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18450059) 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 3 ways as a sum of consecutive naturals, for example, 1317857 + ... + 1317870.

It is an arithmetic number, because the mean of its divisors is an integer number (5271456).

Almost surely, 2^18450089 is an apocalyptic number.

It is an amenable number.

18450089 is a deficient number, since it is larger than the sum of its proper divisors (2635735).

18450089 is an equidigital number, since it uses as much as digits as its factorization.

18450089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635734.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18450089 is about 4295.3566790198. The cubic root of 18450089 is about 264.2405645088.

The spelling of 18450089 in words is "eighteen million, four hundred fifty thousand, eighty-nine".