11518449388 has 24 divisors (see below), whose sum is σ = 20634989760. Its totient is φ = 5622854160.

The previous prime is 11518449347. The next prime is 11518449389. The reversal of 11518449388 is 88394481511.

It is not an unprimeable number, because it can be changed into a prime (11518449389) 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, 422103 + ... + 448561.

It is an arithmetic number, because the mean of its divisors is an integer number (859791240).

Almost surely, 2^11518449388 is an apocalyptic number.

It is an amenable number.

11518449388 is a deficient number, since it is larger than the sum of its proper divisors (9116540372).

11518449388 is a wasteful number, since it uses less digits than its factorization.

11518449388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29037 (or 29035 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 52.

The spelling of 11518449388 in words is "eleven billion, five hundred eighteen million, four hundred forty-nine thousand, three hundred eighty-eight".