18884089 has 4 divisors (see below), whose sum is σ = 21581824. Its totient is φ = 16186356.

The previous prime is 18884051. The next prime is 18884101. The reversal of 18884089 is 98048881.

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 18884089 - 2⁹ = 18883577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18884029) 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, 1348857 + ... + 1348870.

It is an arithmetic number, because the mean of its divisors is an integer number (5395456).

Almost surely, 2^18884089 is an apocalyptic number.

It is an amenable number.

18884089 is a deficient number, since it is larger than the sum of its proper divisors (2697735).

18884089 is an equidigital number, since it uses as much as digits as its factorization.

18884089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697734.

The product of its (nonzero) digits is 147456, while the sum is 46.

The square root of 18884089 is about 4345.5826997078. The cubic root of 18884089 is about 266.2964311745.

The spelling of 18884089 in words is "eighteen million, eight hundred eighty-four thousand, eighty-nine".