18030091 has 8 divisors (see below), whose sum is σ = 19054080. Its totient is φ = 17026152.

The previous prime is 18030079. The next prime is 18030101. The reversal of 18030091 is 19003081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18030091 - 2⁵ = 18030059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18030041) 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 7 ways as a sum of consecutive naturals, for example, 3145 + ... + 6778.

It is an arithmetic number, because the mean of its divisors is an integer number (2381760).

Almost surely, 2^18030091 is an apocalyptic number.

18030091 is a deficient number, since it is larger than the sum of its proper divisors (1023989).

18030091 is an equidigital number, since it uses as much as digits as its factorization.

18030091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10025.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 18030091 is about 4246.1854646259. The cubic root of 18030091 is about 262.2200965054.

The spelling of 18030091 in words is "eighteen million, thirty thousand, ninety-one".