18018343 has 8 divisors (see below), whose sum is σ = 21030912. Its totient is φ = 15115416.

The previous prime is 18018331. The next prime is 18018349. The reversal of 18018343 is 34381081.

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

It is a cyclic number.

It is not a de Polignac number, because 18018343 - 2¹³ = 18010151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18018349) 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 7 ways as a sum of consecutive naturals, for example, 27055 + ... + 27712.

It is an arithmetic number, because the mean of its divisors is an integer number (2628864).

Almost surely, 2^18018343 is an apocalyptic number.

18018343 is a deficient number, since it is larger than the sum of its proper divisors (3012569).

18018343 is an equidigital number, since it uses as much as digits as its factorization.

18018343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54821.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18018343 is about 4244.8018799468. The cubic root of 18018343 is about 262.1631319009.

The spelling of 18018343 in words is "eighteen million, eighteen thousand, three hundred forty-three".