20205556416 has 84 divisors (see below), whose sum is σ = 57937525984. Its totient is φ = 6732633600.

The previous prime is 20205556391. The next prime is 20205556417. The reversal of 20205556416 is 61465550202.

20205556416 is a `hidden beast` number, since 2 + 0 + 2 + 0 + 5 + 5 + 5 + 641 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20205556417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2086626 + ... + 2096286.

Almost surely, 2^20205556416 is an apocalyptic number.

It is an amenable number.

20205556416 is an abundant number, since it is smaller than the sum of its proper divisors (37731969568).

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

20205556416 is a wasteful number, since it uses less digits than its factorization.

20205556416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13310 (or 13297 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 20205556416 in words is "twenty billion, two hundred five million, five hundred fifty-six thousand, four hundred sixteen".