13938834019 has 4 divisors (see below), whose sum is σ = 15206000760. Its totient is φ = 12671667280.

The previous prime is 13938833981. The next prime is 13938834037. The reversal of 13938834019 is 91043883931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13938834019 is a prime.

It is a super-2 number, since 2×13938834019² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13938834319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633583354 + ... + 633583375.

It is an arithmetic number, because the mean of its divisors is an integer number (3801500190).

Almost surely, 2^13938834019 is an apocalyptic number.

13938834019 is a deficient number, since it is larger than the sum of its proper divisors (1267166741).

13938834019 is a wasteful number, since it uses less digits than its factorization.

13938834019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267166740.

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 13938834019 in words is "thirteen billion, nine hundred thirty-eight million, eight hundred thirty-four thousand, nineteen".