11820564954 has 64 divisors (see below), whose sum is σ = 29265684480. Its totient is φ = 3505768560.

The previous prime is 11820564953. The next prime is 11820564971. The reversal of 11820564954 is 45946502811.

11820564954 is a `hidden beast` number, since 1 + 1 + 82 + 0 + 564 + 9 + 5 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (11820564953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183784 + ... + 239619.

It is an arithmetic number, because the mean of its divisors is an integer number (457276320).

Almost surely, 2^11820564954 is an apocalyptic number.

11820564954 is an abundant number, since it is smaller than the sum of its proper divisors (17445119526).

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

11820564954 is a wasteful number, since it uses less digits than its factorization.

11820564954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423472 (or 423466 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 11820564954 in words is "eleven billion, eight hundred twenty million, five hundred sixty-four thousand, nine hundred fifty-four".