13993807813 has 16 divisors (see below), whose sum is σ = 14876896320. Its totient is φ = 13140134784.

The previous prime is 13993807787. The next prime is 13993807831. The reversal of 13993807813 is 31870839931.

It is a happy number.

It is not a de Polignac number, because 13993807813 - 2²¹ = 13991710661 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 (13993807843) 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, 266470 + ... + 314632.

It is an arithmetic number, because the mean of its divisors is an integer number (929806020).

Almost surely, 2^13993807813 is an apocalyptic number.

It is an amenable number.

13993807813 is a deficient number, since it is larger than the sum of its proper divisors (883088507).

13993807813 is a wasteful number, since it uses less digits than its factorization.

13993807813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48468.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 13993807813 in words is "thirteen billion, nine hundred ninety-three million, eight hundred seven thousand, eight hundred thirteen".