18093489 has 12 divisors (see below), whose sum is σ = 24380496. Its totient is φ = 11935512.

The previous prime is 18093463. The next prime is 18093503. The reversal of 18093489 is 98439081.

It is not a de Polignac number, because 18093489 - 2¹⁶ = 18027953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18093489.

It is not an unprimeable number, because it can be changed into a prime (18093689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79594 + ... + 79820.

It is an arithmetic number, because the mean of its divisors is an integer number (2031708).

Almost surely, 2^18093489 is an apocalyptic number.

It is an amenable number.

18093489 is a deficient number, since it is larger than the sum of its proper divisors (6287007).

18093489 is an equidigital number, since it uses as much as digits as its factorization.

18093489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 18093489 is about 4253.6442023282. The cubic root of 18093489 is about 262.5270792926.

The spelling of 18093489 in words is "eighteen million, ninety-three thousand, four hundred eighty-nine".