20105780184808 has 8 divisors (see below), whose sum is σ = 37698337846530. Its totient is φ = 10052890092400.

The previous prime is 20105780184793. The next prime is 20105780184839. The reversal of 20105780184808 is 80848108750102.

It can be written as a sum of positive squares in only one way, i.e., 16945555784004 + 3160224400804 = 4116498^2 + 1777702^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256611261543 + ... + 1256611261558.

Almost surely, 2^{20105780184808} is an apocalyptic number.

It is an amenable number.

20105780184808 is a deficient number, since it is larger than the sum of its proper divisors (17592557661722).

20105780184808 is a wasteful number, since it uses less digits than its factorization.

20105780184808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513222523107 (or 2513222523103 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 52.

The spelling of 20105780184808 in words is "twenty trillion, one hundred five billion, seven hundred eighty million, one hundred eighty-four thousand, eight hundred eight".