18641144 has 8 divisors (see below), whose sum is σ = 34952160. Its totient is φ = 9320568.

The previous prime is 18641141. The next prime is 18641153. The reversal of 18641144 is 44114681.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18641141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165064 + ... + 1165079.

It is an arithmetic number, because the mean of its divisors is an integer number (4369020).

Almost surely, 2^18641144 is an apocalyptic number.

It is an amenable number.

18641144 is a deficient number, since it is larger than the sum of its proper divisors (16311016).

18641144 is a wasteful number, since it uses less digits than its factorization.

18641144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330149 (or 2330145 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 18641144 is about 4317.5391138935. The cubic root of 18641144 is about 265.1495252034.

The spelling of 18641144 in words is "eighteen million, six hundred forty-one thousand, one hundred forty-four".