13894138378 has 4 divisors (see below), whose sum is σ = 20841207570. Its totient is φ = 6947069188.

The previous prime is 13894138373. The next prime is 13894138381. The reversal of 13894138378 is 87383149831.

It is a happy number.

13894138378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 13894044129 + 94249 = 117873^2 + 307^2 .

It is not an unprimeable number, because it can be changed into a prime (13894138373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3473534593 + ... + 3473534596.

Almost surely, 2^13894138378 is an apocalyptic number.

13894138378 is a deficient number, since it is larger than the sum of its proper divisors (6947069192).

13894138378 is an equidigital number, since it uses as much as digits as its factorization.

13894138378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6947069191.

The product of its digits is 3483648, while the sum is 55.

The spelling of 13894138378 in words is "thirteen billion, eight hundred ninety-four million, one hundred thirty-eight thousand, three hundred seventy-eight".