18066367 has 4 divisors (see below), whose sum is σ = 19708776. Its totient is φ = 16423960.

The previous prime is 18066337. The next prime is 18066379. The reversal of 18066367 is 76366081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76366081 = 11 ⋅6942371.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18066367 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18066317) 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, 821188 + ... + 821209.

It is an arithmetic number, because the mean of its divisors is an integer number (4927194).

Almost surely, 2^18066367 is an apocalyptic number.

18066367 is a deficient number, since it is larger than the sum of its proper divisors (1642409).

18066367 is a wasteful number, since it uses less digits than its factorization.

18066367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642408.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 18066367 is about 4250.4549168295. The cubic root of 18066367 is about 262.3958383409.

The spelling of 18066367 in words is "eighteen million, sixty-six thousand, three hundred sixty-seven".