16938863891 has 2 divisors, whose sum is σ = 16938863892. Its totient is φ = 16938863890.

The previous prime is 16938863839. The next prime is 16938863897. The reversal of 16938863891 is 19836883961.

It is a happy number.

16938863891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16938863891 - 2¹⁸ = 16938601747 is a prime.

It is not a weakly prime, because it can be changed into another prime (16938863897) 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, 8469431945 + 8469431946.

It is an arithmetic number, because the mean of its divisors is an integer number (8469431946).

Almost surely, 2^16938863891 is an apocalyptic number.

16938863891 is a deficient number, since it is larger than the sum of its proper divisors (1).

16938863891 is an equidigital number, since it uses as much as digits as its factorization.

16938863891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13436928, while the sum is 62.

The spelling of 16938863891 in words is "sixteen billion, nine hundred thirty-eight million, eight hundred sixty-three thousand, eight hundred ninety-one".