18091104 has 48 divisors (see below), whose sum is σ = 49029120. Its totient is φ = 5834880.

The previous prime is 18091091. The next prime is 18091121. The reversal of 18091104 is 40119081.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64 + ... + 6015.

It is an arithmetic number, because the mean of its divisors is an integer number (1021440).

Almost surely, 2^18091104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18091104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24514560).

18091104 is an abundant number, since it is smaller than the sum of its proper divisors (30938016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18091104 is a wasteful number, since it uses less digits than its factorization.

18091104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123 (or 6115 counting only the distinct ones).

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

The square root of 18091104 is about 4253.3638452406. The cubic root of 18091104 is about 262.5155437508.

The spelling of 18091104 in words is "eighteen million, ninety-one thousand, one hundred four".