18646089 has 32 divisors (see below), whose sum is σ = 31601664. Its totient is φ = 9497280.

The previous prime is 18646079. The next prime is 18646129. The reversal of 18646089 is 98064681.

It is not a de Polignac number, because 18646089 - 2⁴ = 18646073 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18646089.

It is not an unprimeable number, because it can be changed into a prime (18646079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11482 + ... + 13004.

It is an arithmetic number, because the mean of its divisors is an integer number (987552).

Almost surely, 2^18646089 is an apocalyptic number.

It is an amenable number.

18646089 is a deficient number, since it is larger than the sum of its proper divisors (12955575).

18646089 is a wasteful number, since it uses less digits than its factorization.

18646089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 18646089 is about 4318.1117401012. Note that the first 3 decimals coincide. The cubic root of 18646089 is about 265.1729688375.

The spelling of 18646089 in words is "eighteen million, six hundred forty-six thousand, eighty-nine".