18214345 has 8 divisors (see below), whose sum is σ = 21933576. Its totient is φ = 14520576.

The previous prime is 18214297. The next prime is 18214363. The reversal of 18214345 is 54341281.

It can be written as a sum of positive squares in 4 ways, for example, as 2627641 + 15586704 = 1621^2 + 3948^2 .

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 18214345 - 2¹⁵ = 18181577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4752 + ... + 7681.

It is an arithmetic number, because the mean of its divisors is an integer number (2741697).

Almost surely, 2^18214345 is an apocalyptic number.

It is an amenable number.

18214345 is a deficient number, since it is larger than the sum of its proper divisors (3719231).

18214345 is a wasteful number, since it uses less digits than its factorization.

18214345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12731.

The product of its digits is 3840, while the sum is 28.

The square root of 18214345 is about 4267.8267303160. The cubic root of 18214345 is about 263.1103018178.

The spelling of 18214345 in words is "eighteen million, two hundred fourteen thousand, three hundred forty-five".