20538484056 has 24 divisors (see below), whose sum is σ = 55625061180. Its totient is φ = 6846161328.

The previous prime is 20538484049. The next prime is 20538484073. The reversal of 20538484056 is 65048483502.

20538484056 is a `hidden beast` number, since 20 + 538 + 4 + 8 + 40 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×20538484056² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 142628290 + ... + 142628433.

Almost surely, 2^20538484056 is an apocalyptic number.

It is an amenable number.

20538484056 is an abundant number, since it is smaller than the sum of its proper divisors (35086577124).

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

20538484056 is a wasteful number, since it uses less digits than its factorization.

20538484056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285256735 (or 285256728 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 20538484056 in words is "twenty billion, five hundred thirty-eight million, four hundred eighty-four thousand, fifty-six".