18489343 has 4 divisors (see below), whose sum is σ = 18659080. Its totient is φ = 18319608.

The previous prime is 18489311. The next prime is 18489347. The reversal of 18489343 is 34398481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18489343 - 2⁵ = 18489311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18489296 and 18489305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18489347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84705 + ... + 84922.

It is an arithmetic number, because the mean of its divisors is an integer number (4664770).

Almost surely, 2^18489343 is an apocalyptic number.

18489343 is a deficient number, since it is larger than the sum of its proper divisors (169737).

18489343 is a wasteful number, since it uses less digits than its factorization.

18489343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169736.

The product of its digits is 82944, while the sum is 40.

The square root of 18489343 is about 4299.9236039725. The cubic root of 18489343 is about 264.4278292189.

The spelling of 18489343 in words is "eighteen million, four hundred eighty-nine thousand, three hundred forty-three".