18340363 has 4 divisors (see below), whose sum is σ = 18374440. Its totient is φ = 18306288.

The previous prime is 18340349. The next prime is 18340369. The reversal of 18340363 is 36304381.

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 18340363 - 2⁹ = 18339851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18340369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16218 + ... + 17311.

It is an arithmetic number, because the mean of its divisors is an integer number (4593610).

Almost surely, 2^18340363 is an apocalyptic number.

18340363 is a deficient number, since it is larger than the sum of its proper divisors (34077).

18340363 is an equidigital number, since it uses as much as digits as its factorization.

18340363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34076.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 18340363 is about 4282.5650024255. The cubic root of 18340363 is about 263.7156938976.

The spelling of 18340363 in words is "eighteen million, three hundred forty thousand, three hundred sixty-three".