16938863894 has 4 divisors (see below), whose sum is σ = 25408295844. Its totient is φ = 8469431946.

The previous prime is 16938863891. The next prime is 16938863897. The reversal of 16938863894 is 49836883961.

16938863894 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 is an interprime number because it is at equal distance from previous prime (16938863891) and next prime (16938863897).

It is a super-2 number, since 2×16938863894² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16938863894.

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 as a sum of consecutive naturals, namely, 4234715972 + ... + 4234715975.

It is an arithmetic number, because the mean of its divisors is an integer number (6352073961).

Almost surely, 2^16938863894 is an apocalyptic number.

16938863894 is a deficient number, since it is larger than the sum of its proper divisors (8469431950).

16938863894 is an equidigital number, since it uses as much as digits as its factorization.

16938863894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8469431949.

The product of its digits is 53747712, while the sum is 65.

The spelling of 16938863894 in words is "sixteen billion, nine hundred thirty-eight million, eight hundred sixty-three thousand, eight hundred ninety-four".