18368091 has 18 divisors (see below), whose sum is σ = 30864132. Its totient is φ = 10495800.

The previous prime is 18368071. The next prime is 18368111. The reversal of 18368091 is 19086381.

It is an interprime number because it is at equal distance from previous prime (18368071) and next prime (18368111).

It is not a de Polignac number, because 18368091 - 2⁷ = 18367963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18368071) 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 17 ways as a sum of consecutive naturals, for example, 20385 + ... + 21266.

It is an arithmetic number, because the mean of its divisors is an integer number (1714674).

Almost surely, 2^18368091 is an apocalyptic number.

18368091 is a deficient number, since it is larger than the sum of its proper divisors (12496041).

18368091 is a wasteful number, since it uses less digits than its factorization.

18368091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41671 (or 41661 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18368091 is about 4285.8010919780. The cubic root of 18368091 is about 263.8485270881.

The spelling of 18368091 in words is "eighteen million, three hundred sixty-eight thousand, ninety-one".