18382307 has 4 divisors (see below), whose sum is σ = 18560880. Its totient is φ = 18203736.

The previous prime is 18382297. The next prime is 18382319. The reversal of 18382307 is 70328381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70328381 = 4091 ⋅17191.

It is a cyclic number.

It is not a de Polignac number, because 18382307 - 2¹⁴ = 18365923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18382337) 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, 89132 + ... + 89337.

It is an arithmetic number, because the mean of its divisors is an integer number (4640220).

Almost surely, 2^18382307 is an apocalyptic number.

18382307 is a deficient number, since it is larger than the sum of its proper divisors (178573).

18382307 is a wasteful number, since it uses less digits than its factorization.

18382307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178572.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 18382307 is about 4287.4592709436. The cubic root of 18382307 is about 263.9165781340.

The spelling of 18382307 in words is "eighteen million, three hundred eighty-two thousand, three hundred seven".