20216768571 has 12 divisors (see below), whose sum is σ = 29214450720. Its totient is φ = 13472098800.

The previous prime is 20216768563. The next prime is 20216768591. The reversal of 20216768571 is 17586761202.

20216768571 is a `hidden beast` number, since 2 + 0 + 2 + 1 + 6 + 76 + 8 + 571 = 666.

It is not a de Polignac number, because 20216768571 - 2³ = 20216768563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20216768591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 456576 + ... + 498893.

It is an arithmetic number, because the mean of its divisors is an integer number (2434537560).

Almost surely, 2^20216768571 is an apocalyptic number.

20216768571 is a deficient number, since it is larger than the sum of its proper divisors (8997682149).

20216768571 is a wasteful number, since it uses less digits than its factorization.

20216768571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957826 (or 957823 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 20216768571 in words is "twenty billion, two hundred sixteen million, seven hundred sixty-eight thousand, five hundred seventy-one".