18036911 has 4 divisors (see below), whose sum is σ = 18291024. Its totient is φ = 17782800.

The previous prime is 18036877. The next prime is 18036923. The reversal of 18036911 is 11963081.

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-18036911 is a prime.

It is a super-3 number, since 3×18036911³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126950 + ... + 127091.

It is an arithmetic number, because the mean of its divisors is an integer number (4572756).

Almost surely, 2^18036911 is an apocalyptic number.

18036911 is a deficient number, since it is larger than the sum of its proper divisors (254113).

18036911 is an equidigital number, since it uses as much as digits as its factorization.

18036911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254112.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 18036911 is about 4246.9884624284. The cubic root of 18036911 is about 262.2531544939.

Adding to 18036911 its reverse (11963081), we get a palindrome (29999992).

The spelling of 18036911 in words is "eighteen million, thirty-six thousand, nine hundred eleven".