20217168716722 has 16 divisors (see below), whose sum is σ = 30423407893272. Its totient is φ = 10076036924800.

The previous prime is 20217168716687. The next prime is 20217168716807. The reversal of 20217168716722 is 22761786171202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16497821186001 + 3719347530721 = 4061751^2 + 1928561^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20217168716722.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8728968 + ... + 10799500.

Almost surely, 2^{20217168716722} is an apocalyptic number.

20217168716722 is a deficient number, since it is larger than the sum of its proper divisors (10206239176550).

20217168716722 is a wasteful number, since it uses less digits than its factorization.

20217168716722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086253.

The product of its (nonzero) digits is 1580544, while the sum is 52.

The spelling of 20217168716722 in words is "twenty trillion, two hundred seventeen billion, one hundred sixty-eight million, seven hundred sixteen thousand, seven hundred twenty-two".