18089121 has 8 divisors (see below), whose sum is σ = 25388320. Its totient is φ = 11424672.

The previous prime is 18089119. The next prime is 18089143. The reversal of 18089121 is 12198081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18089121 - 2¹ = 18089119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18089171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158620 + ... + 158733.

It is an arithmetic number, because the mean of its divisors is an integer number (3173540).

Almost surely, 2^18089121 is an apocalyptic number.

It is an amenable number.

18089121 is a deficient number, since it is larger than the sum of its proper divisors (7299199).

18089121 is a wasteful number, since it uses less digits than its factorization.

18089121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317375.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 18089121 is about 4253.1307292393. The cubic root of 18089121 is about 262.5059517925.

The spelling of 18089121 in words is "eighteen million, eighty-nine thousand, one hundred twenty-one".