11018439638 has 16 divisors (see below), whose sum is σ = 16803842640. Its totient is φ = 5417215200.

The previous prime is 11018439637. The next prime is 11018439697. The reversal of 11018439638 is 83693481011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11018439631) 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 7 ways as a sum of consecutive naturals, for example, 438068 + ... + 462536.

It is an arithmetic number, because the mean of its divisors is an integer number (1050240165).

Almost surely, 2^11018439638 is an apocalyptic number.

11018439638 is a deficient number, since it is larger than the sum of its proper divisors (5785403002).

11018439638 is a wasteful number, since it uses less digits than its factorization.

11018439638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28223.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 11018439638 in words is "eleven billion, eighteen million, four hundred thirty-nine thousand, six hundred thirty-eight".