11521867396 has 24 divisors (see below), whose sum is σ = 22243909464. Its totient is φ = 5188081920.

The previous prime is 11521867393. The next prime is 11521867397. The reversal of 11521867396 is 69376812511.

11521867396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6431296 + 11515436100 = 2536^2 + 107310^2 .

It is not an unprimeable number, because it can be changed into a prime (11521867393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2699995 + ... + 2704258.

It is an arithmetic number, because the mean of its divisors is an integer number (926829561).

Almost surely, 2^11521867396 is an apocalyptic number.

It is an amenable number.

11521867396 is a deficient number, since it is larger than the sum of its proper divisors (10722042068).

11521867396 is a wasteful number, since it uses less digits than its factorization.

11521867396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5404311 (or 5404309 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The spelling of 11521867396 in words is "eleven billion, five hundred twenty-one million, eight hundred sixty-seven thousand, three hundred ninety-six".