20385505368723 has 16 divisors (see below), whose sum is σ = 29651719758336. Its totient is φ = 12354820244640.

The previous prime is 20385505368721. The next prime is 20385505368751. The reversal of 20385505368723 is 32786350558302.

It is not a de Polignac number, because 20385505368723 - 2¹ = 20385505368721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20385505368721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24025665 + ... + 24859677.

It is an arithmetic number, because the mean of its divisors is an integer number (1853232484896).

Almost surely, 2^{20385505368723} is an apocalyptic number.

20385505368723 is a deficient number, since it is larger than the sum of its proper divisors (9266214389613).

20385505368723 is a wasteful number, since it uses less digits than its factorization.

20385505368723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574714.

The product of its (nonzero) digits is 36288000, while the sum is 57.

The spelling of 20385505368723 in words is "twenty trillion, three hundred eighty-five billion, five hundred five million, three hundred sixty-eight thousand, seven hundred twenty-three".