18341689 has 4 divisors (see below), whose sum is σ = 18351360. Its totient is φ = 18332020.

The previous prime is 18341683. The next prime is 18341699. The reversal of 18341689 is 98614381.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98614381 = 137 ⋅719813.

It is a cyclic number.

It is not a de Polignac number, because 18341689 - 2¹⁵ = 18308921 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18341683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 949 + ... + 6130.

It is an arithmetic number, because the mean of its divisors is an integer number (4587840).

Almost surely, 2^18341689 is an apocalyptic number.

It is an amenable number.

18341689 is a deficient number, since it is larger than the sum of its proper divisors (9671).

18341689 is an equidigital number, since it uses as much as digits as its factorization.

18341689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9670.

The product of its digits is 41472, while the sum is 40.

The square root of 18341689 is about 4282.7198133896. The cubic root of 18341689 is about 263.7220492531.

The spelling of 18341689 in words is "eighteen million, three hundred forty-one thousand, six hundred eighty-nine".