18331343 has 4 divisors (see below), whose sum is σ = 18342888. Its totient is φ = 18319800.

The previous prime is 18331331. The next prime is 18331349. The reversal of 18331343 is 34313381.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18331343 - 2⁶ = 18331279 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 (18331349) 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, 2921 + ... + 6722.

It is an arithmetic number, because the mean of its divisors is an integer number (4585722).

Almost surely, 2^18331343 is an apocalyptic number.

18331343 is a deficient number, since it is larger than the sum of its proper divisors (11545).

18331343 is an equidigital number, since it uses as much as digits as its factorization.

18331343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11544.

The product of its digits is 2592, while the sum is 26.

The square root of 18331343 is about 4281.5117657201. The cubic root of 18331343 is about 263.6724540114.

The spelling of 18331343 in words is "eighteen million, three hundred thirty-one thousand, three hundred forty-three".