18108379 has 4 divisors (see below), whose sum is σ = 18135576. Its totient is φ = 18081184.

The previous prime is 18108367. The next prime is 18108401. The reversal of 18108379 is 97380181.

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 18108379 - 2¹⁵ = 18075611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18148379) 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, 12574 + ... + 13939.

It is an arithmetic number, because the mean of its divisors is an integer number (4533894).

Almost surely, 2^18108379 is an apocalyptic number.

18108379 is a deficient number, since it is larger than the sum of its proper divisors (27197).

18108379 is an equidigital number, since it uses as much as digits as its factorization.

18108379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27196.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 18108379 is about 4255.3941063079. The cubic root of 18108379 is about 262.5990749221.

The spelling of 18108379 in words is "eighteen million, one hundred eight thousand, three hundred seventy-nine".