13938843867 has 32 divisors (see below), whose sum is σ = 20110110720. Its totient is φ = 8536993920.

The previous prime is 13938843851. The next prime is 13938843911. The reversal of 13938843867 is 76834883931.

It is not a de Polignac number, because 13938843867 - 2⁴ = 13938843851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13938843867.

It is not an unprimeable number, because it can be changed into a prime (13938843467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13038609 + ... + 13039677.

It is an arithmetic number, because the mean of its divisors is an integer number (628440960).

Almost surely, 2^13938843867 is an apocalyptic number.

13938843867 is a deficient number, since it is larger than the sum of its proper divisors (6171266853).

13938843867 is a wasteful number, since it uses less digits than its factorization.

13938843867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363.

The product of its digits is 20901888, while the sum is 60.

The spelling of 13938843867 in words is "thirteen billion, nine hundred thirty-eight million, eight hundred forty-three thousand, eight hundred sixty-seven".