20784368772 has 48 divisors (see below), whose sum is σ = 53898604480. Its totient is φ = 6926425344.

The previous prime is 20784368747. The next prime is 20784368791. The reversal of 20784368772 is 27786348702.

20784368772 is a `hidden beast` number, since 207 + 8 + 4 + 368 + 7 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466083 + ... + 508725.

Almost surely, 2^20784368772 is an apocalyptic number.

It is an amenable number.

20784368772 is an abundant number, since it is smaller than the sum of its proper divisors (33114235708).

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

20784368772 is a wasteful number, since it uses less digits than its factorization.

20784368772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47169 (or 47161 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 54.

The spelling of 20784368772 in words is "twenty billion, seven hundred eighty-four million, three hundred sixty-eight thousand, seven hundred seventy-two".