18366079 has 4 divisors (see below), whose sum is σ = 18436176. Its totient is φ = 18295984.

The previous prime is 18366071. The next prime is 18366091. The reversal of 18366079 is 97066381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97066381 = 2531 ⋅38351.

It is a cyclic number.

It is not a de Polignac number, because 18366079 - 2³ = 18366071 is a prime.

It is a super-3 number, since 3×18366079³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366071) 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, 34654 + ... + 35179.

It is an arithmetic number, because the mean of its divisors is an integer number (4609044).

Almost surely, 2^18366079 is an apocalyptic number.

18366079 is a deficient number, since it is larger than the sum of its proper divisors (70097).

18366079 is an equidigital number, since it uses as much as digits as its factorization.

18366079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70096.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 18366079 is about 4285.5663569708. The cubic root of 18366079 is about 263.8388929419.

The spelling of 18366079 in words is "eighteen million, three hundred sixty-six thousand, seventy-nine".