20748170537717 has 32 divisors (see below), whose sum is σ = 24564875339520. Its totient is φ = 17146396108800.

The previous prime is 20748170537687. The next prime is 20748170537737. The reversal of 20748170537717 is 71773507184702.

It is a happy number.

It is not a de Polignac number, because 20748170537717 - 2¹⁰ = 20748170536693 is a prime.

It is a super-3 number, since 3×20748170537717³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20748170537737) 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, 983268467 + ... + 983289567.

It is an arithmetic number, because the mean of its divisors is an integer number (767652354360).

Almost surely, 2^{20748170537717} is an apocalyptic number.

It is an amenable number.

20748170537717 is a deficient number, since it is larger than the sum of its proper divisors (3816704801803).

20748170537717 is a wasteful number, since it uses less digits than its factorization.

20748170537717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27821.

The product of its (nonzero) digits is 16134720, while the sum is 59.

The spelling of 20748170537717 in words is "twenty trillion, seven hundred forty-eight billion, one hundred seventy million, five hundred thirty-seven thousand, seven hundred seventeen".