13956823321 has 15 divisors (see below), whose sum is σ = 16288747733. Its totient is φ = 11958029580.

The previous prime is 13956823313. The next prime is 13956823357. The reversal of 13956823321 is 12332865931.

The square root of 13956823321 is 118139.

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

It is not a de Polignac number, because 13956823321 - 2³ = 13956823313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13956823121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5787606 + ... + 5790016.

Almost surely, 2^13956823321 is an apocalyptic number.

13956823321 is the 118139-th square number.

13956823321 is the 59070-th centered octagonal number.

It is an amenable number.

13956823321 is a deficient number, since it is larger than the sum of its proper divisors (2331924412).

13956823321 is an frugal number, since it uses more digits than its factorization.

13956823321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850 (or 2418 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The spelling of 13956823321 in words is "thirteen billion, nine hundred fifty-six million, eight hundred twenty-three thousand, three hundred twenty-one".