18326149 has 4 divisors (see below), whose sum is σ = 18405036. Its totient is φ = 18247264.

The previous prime is 18326129. The next prime is 18326159. The reversal of 18326149 is 94162381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11009124 + 7317025 = 3318^2 + 2705^2 .

It is a cyclic number.

It is not a de Polignac number, because 18326149 - 2⁵ = 18326117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18326129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39094 + ... + 39559.

It is an arithmetic number, because the mean of its divisors is an integer number (4601259).

Almost surely, 2^18326149 is an apocalyptic number.

It is an amenable number.

18326149 is a deficient number, since it is larger than the sum of its proper divisors (78887).

18326149 is an equidigital number, since it uses as much as digits as its factorization.

18326149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78886.

The product of its digits is 10368, while the sum is 34.

The square root of 18326149 is about 4280.9051612947. The cubic root of 18326149 is about 263.6475486877.

The spelling of 18326149 in words is "eighteen million, three hundred twenty-six thousand, one hundred forty-nine".