13820823844 has 27 divisors (see below), whose sum is σ = 24780125307. Its totient is φ = 6744767064.

The previous prime is 13820823827. The next prime is 13820823869. The reversal of 13820823844 is 44832802831.

The square root of 13820823844 is 117562.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13820823844.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10109649 + ... + 10111015.

Almost surely, 2^13820823844 is an apocalyptic number.

13820823844 is the 117562-nd square number.

It is an amenable number.

13820823844 is a deficient number, since it is larger than the sum of its proper divisors (10959301463).

13820823844 is an frugal number, since it uses more digits than its factorization.

13820823844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824 (or 1412 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 43.

The spelling of 13820823844 in words is "thirteen billion, eight hundred twenty million, eight hundred twenty-three thousand, eight hundred forty-four".