18481089 has 16 divisors (see below), whose sum is σ = 26990784. Its totient is φ = 11155200.

The previous prime is 18481069. The next prime is 18481097. The reversal of 18481089 is 98018481.

It is a happy number.

It is not a de Polignac number, because 18481089 - 2⁹ = 18480577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18481009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8277 + ... + 10269.

It is an arithmetic number, because the mean of its divisors is an integer number (1686924).

Almost surely, 2^18481089 is an apocalyptic number.

It is an amenable number.

18481089 is a deficient number, since it is larger than the sum of its proper divisors (8509695).

18481089 is a wasteful number, since it uses less digits than its factorization.

18481089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288.

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 18481089 is about 4298.9637123381. The cubic root of 18481089 is about 264.3884747979.

The spelling of 18481089 in words is "eighteen million, four hundred eighty-one thousand, eighty-nine".