20798605788729 has 16 divisors (see below), whose sum is σ = 29363512800960. Its totient is φ = 13049761052160.

The previous prime is 20798605788703. The next prime is 20798605788731. The reversal of 20798605788729 is 92788750689702.

It is not a de Polignac number, because 20798605788729 - 2²⁴ = 20798589011513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20798605784729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3425884 + ... + 7303005.

It is an arithmetic number, because the mean of its divisors is an integer number (1835219550060).

Almost surely, 2^{20798605788729} is an apocalyptic number.

It is an amenable number.

20798605788729 is a deficient number, since it is larger than the sum of its proper divisors (8564907012231).

20798605788729 is a wasteful number, since it uses less digits than its factorization.

20798605788729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10766920.

The product of its (nonzero) digits is 1706987520, while the sum is 78.

The spelling of 20798605788729 in words is "twenty trillion, seven hundred ninety-eight billion, six hundred five million, seven hundred eighty-eight thousand, seven hundred twenty-nine".