20556116334 has 40 divisors (see below), whose sum is σ = 49604080680. Its totient is φ = 6324958224.

The previous prime is 20556116323. The next prime is 20556116341. The reversal of 20556116334 is 43361165502.

20556116334 is a `hidden beast` number, since 2 + 0 + 5 + 5 + 6 + 11 + 633 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4878264 + ... + 4882475.

It is an arithmetic number, because the mean of its divisors is an integer number (1240102017).

Almost surely, 2^20556116334 is an apocalyptic number.

20556116334 is an abundant number, since it is smaller than the sum of its proper divisors (29047964346).

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

20556116334 is a wasteful number, since it uses less digits than its factorization.

20556116334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9760766 (or 9760757 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 20556116334 in words is "twenty billion, five hundred fifty-six million, one hundred sixteen thousand, three hundred thirty-four".