11518439432 has 16 divisors (see below), whose sum is σ = 21611600700. Its totient is φ = 5755345920.

The previous prime is 11518439431. The next prime is 11518439441. The reversal of 11518439432 is 23493481511.

It can be written as a sum of positive squares in 2 ways, for example, as 11233032196 + 285407236 = 105986^2 + 16894^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11518439432.

It is not an unprimeable number, because it can be changed into a prime (11518439431) 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, 471569 + ... + 495392.

Almost surely, 2^11518439432 is an apocalyptic number.

It is an amenable number.

11518439432 is a deficient number, since it is larger than the sum of its proper divisors (10093161268).

11518439432 is a wasteful number, since it uses less digits than its factorization.

11518439432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968456 (or 968452 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The spelling of 11518439432 in words is "eleven billion, five hundred eighteen million, four hundred thirty-nine thousand, four hundred thirty-two".