16938863893 has 4 divisors (see below), whose sum is σ = 19358701600. Its totient is φ = 14519026188.

The previous prime is 16938863891. The next prime is 16938863897. The reversal of 16938863893 is 39836883961.

16938863893 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39836883961 = 7 ⋅5690983423.

It is a cyclic number.

It is not a de Polignac number, because 16938863893 - 2¹ = 16938863891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16938863891) 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 in 3 ways as a sum of consecutive naturals, for example, 1209918843 + ... + 1209918856.

It is an arithmetic number, because the mean of its divisors is an integer number (4839675400).

Almost surely, 2^16938863893 is an apocalyptic number.

It is an amenable number.

16938863893 is a deficient number, since it is larger than the sum of its proper divisors (2419837707).

16938863893 is an equidigital number, since it uses as much as digits as its factorization.

16938863893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419837706.

The product of its digits is 40310784, while the sum is 64.

The spelling of 16938863893 in words is "sixteen billion, nine hundred thirty-eight million, eight hundred sixty-three thousand, eight hundred ninety-three".