20566570172722 has 32 divisors (see below), whose sum is σ = 35669048591232. Its totient is φ = 8711474517504.

The previous prime is 20566570172719. The next prime is 20566570172741. The reversal of 20566570172722 is 22727107566502.

It is a self number, because there is not a number n which added to its sum of digits gives 20566570172722.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9335248 + ... + 11326075.

It is an arithmetic number, because the mean of its divisors is an integer number (1114657768476).

Almost surely, 2^{20566570172722} is an apocalyptic number.

20566570172722 is a deficient number, since it is larger than the sum of its proper divisors (15102478418510).

20566570172722 is a wasteful number, since it uses less digits than its factorization.

20566570172722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20662162.

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 20566570172722 in words is "twenty trillion, five hundred sixty-six billion, five hundred seventy million, one hundred seventy-two thousand, seven hundred twenty-two".