18934589 has 4 divisors (see below), whose sum is σ = 19757856. Its totient is φ = 18111324.

The previous prime is 18934547. The next prime is 18934607. The reversal of 18934589 is 98543981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18934589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18934519) 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 3 ways as a sum of consecutive naturals, for example, 411599 + ... + 411644.

It is an arithmetic number, because the mean of its divisors is an integer number (4939464).

Almost surely, 2^18934589 is an apocalyptic number.

It is an amenable number.

18934589 is a deficient number, since it is larger than the sum of its proper divisors (823267).

18934589 is an equidigital number, since it uses as much as digits as its factorization.

18934589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823266.

The product of its digits is 311040, while the sum is 47.

The square root of 18934589 is about 4351.3893183672. The cubic root of 18934589 is about 266.5335973234.

The spelling of 18934589 in words is "eighteen million, nine hundred thirty-four thousand, five hundred eighty-nine".