18402343 has 4 divisors (see below), whose sum is σ = 18414448. Its totient is φ = 18390240.

The previous prime is 18402337. The next prime is 18402353. The reversal of 18402343 is 34320481.

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 18402343 - 2⁵ = 18402311 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 (18402353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3378 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (4603612).

Almost surely, 2^18402343 is an apocalyptic number.

18402343 is a deficient number, since it is larger than the sum of its proper divisors (12105).

18402343 is a wasteful number, since it uses less digits than its factorization.

18402343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12104.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 18402343 is about 4289.7952165575. The cubic root of 18402343 is about 264.0124295877.

The spelling of 18402343 in words is "eighteen million, four hundred two thousand, three hundred forty-three".