11820635816 has 32 divisors (see below), whose sum is σ = 24200575200. Its totient is φ = 5368127040.

The previous prime is 11820635803. The next prime is 11820635833. The reversal of 11820635816 is 61853602811.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37031 + ... + 158153.

It is an arithmetic number, because the mean of its divisors is an integer number (756267975).

Almost surely, 2^11820635816 is an apocalyptic number.

It is an amenable number.

11820635816 is an abundant number, since it is smaller than the sum of its proper divisors (12379939384).

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

11820635816 is a wasteful number, since it uses less digits than its factorization.

11820635816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122249 (or 122245 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 11820635816 in words is "eleven billion, eight hundred twenty million, six hundred thirty-five thousand, eight hundred sixteen".