11787323920 has 20 divisors (see below), whose sum is σ = 27405528300. Its totient is φ = 4714929536.

The previous prime is 11787323897. The next prime is 11787323921. The reversal of 11787323920 is 2932378711.

It can be written as a sum of positive squares in 2 ways, for example, as 6016794624 + 5770529296 = 77568^2 + 75964^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (11787323921) 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, 73670695 + ... + 73670854.

It is an arithmetic number, because the mean of its divisors is an integer number (1370276415).

Almost surely, 2^11787323920 is an apocalyptic number.

11787323920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11787323920 is an abundant number, since it is smaller than the sum of its proper divisors (15618204380).

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

11787323920 is a wasteful number, since it uses less digits than its factorization.

11787323920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147341562 (or 147341556 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 11787323920 in words is "eleven billion, seven hundred eighty-seven million, three hundred twenty-three thousand, nine hundred twenty".