18115011 has 12 divisors (see below), whose sum is σ = 26535600. Its totient is φ = 11906160.

The previous prime is 18114977. The next prime is 18115033. The reversal of 18115011 is 11051181.

It is a happy number.

It is not a de Polignac number, because 18115011 - 2⁷ = 18114883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18115061) 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 11 ways as a sum of consecutive naturals, for example, 13536 + ... + 14813.

It is an arithmetic number, because the mean of its divisors is an integer number (2211300).

Almost surely, 2^18115011 is an apocalyptic number.

18115011 is a deficient number, since it is larger than the sum of its proper divisors (8420589).

18115011 is a wasteful number, since it uses less digits than its factorization.

18115011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28426 (or 28423 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 18.

The square root of 18115011 is about 4256.1732812469. The cubic root of 18115011 is about 262.6311290428.

Adding to 18115011 its reverse (11051181), we get a palindrome (29166192).

The spelling of 18115011 in words is "eighteen million, one hundred fifteen thousand, eleven".