13836721823 has 16 divisors (see below), whose sum is σ = 15286164480. Its totient is φ = 12465994464.

The previous prime is 13836721807. The next prime is 13836721867. The reversal of 13836721823 is 32812763831.

It is a cyclic number.

It is not a de Polignac number, because 13836721823 - 2⁴ = 13836721807 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 (13836727823) 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, 15911 + ... + 167112.

It is an arithmetic number, because the mean of its divisors is an integer number (955385280).

Almost surely, 2^13836721823 is an apocalyptic number.

13836721823 is a deficient number, since it is larger than the sum of its proper divisors (1449442657).

13836721823 is a wasteful number, since it uses less digits than its factorization.

13836721823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183238.

The product of its digits is 290304, while the sum is 44.

The spelling of 13836721823 in words is "thirteen billion, eight hundred thirty-six million, seven hundred twenty-one thousand, eight hundred twenty-three".