18674889 has 8 divisors (see below), whose sum is σ = 25215360. Its totient is φ = 12292176.

The previous prime is 18674879. The next prime is 18674911. The reversal of 18674889 is 98847681.

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

It is not a de Polignac number, because 18674889 - 2²⁰ = 17626313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18674809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39162 + ... + 39635.

It is an arithmetic number, because the mean of its divisors is an integer number (3151920).

Almost surely, 2^18674889 is an apocalyptic number.

It is an amenable number.

18674889 is a deficient number, since it is larger than the sum of its proper divisors (6540471).

18674889 is an equidigital number, since it uses as much as digits as its factorization.

18674889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78879.

The product of its digits is 774144, while the sum is 51.

The square root of 18674889 is about 4321.4452443598. The cubic root of 18674889 is about 265.3094237789.

The spelling of 18674889 in words is "eighteen million, six hundred seventy-four thousand, eight hundred eighty-nine".