18216113108 has 24 divisors (see below), whose sum is σ = 32327725248. Its totient is φ = 8979719616.

The previous prime is 18216113107. The next prime is 18216113141. The reversal of 18216113108 is 80131161281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18216113107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 819185 + ... + 841127.

It is an arithmetic number, because the mean of its divisors is an integer number (1346988552).

Almost surely, 2^18216113108 is an apocalyptic number.

It is an amenable number.

18216113108 is a deficient number, since it is larger than the sum of its proper divisors (14111612140).

18216113108 is a wasteful number, since it uses less digits than its factorization.

18216113108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24863 (or 24861 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

Adding to 18216113108 its reverse (80131161281), we get a palindrome (98347274389).

The spelling of 18216113108 in words is "eighteen billion, two hundred sixteen million, one hundred thirteen thousand, one hundred eight".