18346389 has 8 divisors (see below), whose sum is σ = 25251072. Its totient is φ = 11836320.

The previous prime is 18346379. The next prime is 18346397. The reversal of 18346389 is 98364381.

It is a happy number.

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

It is not a de Polignac number, because 18346389 - 2⁴ = 18346373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18346389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18346319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98544 + ... + 98729.

It is an arithmetic number, because the mean of its divisors is an integer number (3156384).

Almost surely, 2^18346389 is an apocalyptic number.

It is an amenable number.

18346389 is a deficient number, since it is larger than the sum of its proper divisors (6904683).

18346389 is a wasteful number, since it uses less digits than its factorization.

18346389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197307.

The product of its digits is 124416, while the sum is 42.

The square root of 18346389 is about 4283.2684949697. The cubic root of 18346389 is about 263.7445733106.

The spelling of 18346389 in words is "eighteen million, three hundred forty-six thousand, three hundred eighty-nine".