18041109 has 4 divisors (see below), whose sum is σ = 24054816. Its totient is φ = 12027404.

The previous prime is 18041099. The next prime is 18041159. The reversal of 18041109 is 90114081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90114081 = 3 ⋅30038027.

It is a cyclic number.

It is not a de Polignac number, because 18041109 - 2⁵ = 18041077 is a prime.

It is a super-2 number, since 2×18041109² = 650963227899762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18041159) 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, 3006849 + ... + 3006854.

It is an arithmetic number, because the mean of its divisors is an integer number (6013704).

Almost surely, 2^18041109 is an apocalyptic number.

It is an amenable number.

18041109 is a deficient number, since it is larger than the sum of its proper divisors (6013707).

18041109 is an equidigital number, since it uses as much as digits as its factorization.

18041109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013706.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 18041109 is about 4247.4826662389. The cubic root of 18041109 is about 262.2734989483.

The spelling of 18041109 in words is "eighteen million, forty-one thousand, one hundred nine".