18441011 has 4 divisors (see below), whose sum is σ = 18475272. Its totient is φ = 18406752.

The previous prime is 18440999. The next prime is 18441019. The reversal of 18441011 is 11014481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18441011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18441019) 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, 16310 + ... + 17403.

It is an arithmetic number, because the mean of its divisors is an integer number (4618818).

Almost surely, 2^18441011 is an apocalyptic number.

18441011 is a deficient number, since it is larger than the sum of its proper divisors (34261).

18441011 is an equidigital number, since it uses as much as digits as its factorization.

18441011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34260.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 18441011 is about 4294.2998265142. The cubic root of 18441011 is about 264.1972192911.

Adding to 18441011 its reverse (11014481), we get a palindrome (29455492).

The spelling of 18441011 in words is "eighteen million, four hundred forty-one thousand, eleven".