11911804436 has 24 divisors (see below), whose sum is σ = 24592114176. Its totient is φ = 4940379360.

The previous prime is 11911804427. The next prime is 11911804439. The reversal of 11911804436 is 63440811911.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11911804436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11911804439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6860771 + ... + 6862506.

It is an arithmetic number, because the mean of its divisors is an integer number (1024671424).

Almost surely, 2^11911804436 is an apocalyptic number.

It is an amenable number.

11911804436 is an abundant number, since it is smaller than the sum of its proper divisors (12680309740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11911804436 is a wasteful number, since it uses less digits than its factorization.

11911804436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13723319 (or 13723317 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 11911804436 in words is "eleven billion, nine hundred eleven million, eight hundred four thousand, four hundred thirty-six".