20553707742717 has 32 divisors (see below), whose sum is σ = 28078880220160. Its totient is φ = 13366342604160.

The previous prime is 20553707742653. The next prime is 20553707742719. The reversal of 20553707742717 is 71724770735502.

It is a happy number.

It is not a de Polignac number, because 20553707742717 - 2⁶ = 20553707742653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553707742719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 575216742 + ... + 575252472.

It is an arithmetic number, because the mean of its divisors is an integer number (877465006880).

Almost surely, 2^{20553707742717} is an apocalyptic number.

It is an amenable number.

20553707742717 is a deficient number, since it is larger than the sum of its proper divisors (7525172477443).

20553707742717 is a wasteful number, since it uses less digits than its factorization.

20553707742717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41473.

The product of its (nonzero) digits is 20168400, while the sum is 57.

The spelling of 20553707742717 in words is "twenty trillion, five hundred fifty-three billion, seven hundred seven million, seven hundred forty-two thousand, seven hundred seventeen".