16890959423 has 4 divisors (see below), whose sum is σ = 18190264008. Its totient is φ = 15591654840.

The previous prime is 16890959419. The next prime is 16890959441. The reversal of 16890959423 is 32495909861.

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

It is a cyclic number.

It is not a de Polignac number, because 16890959423 - 2² = 16890959419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16890959483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649652273 + ... + 649652298.

It is an arithmetic number, because the mean of its divisors is an integer number (4547566002).

Almost surely, 2^16890959423 is an apocalyptic number.

16890959423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16890959423 is a deficient number, since it is larger than the sum of its proper divisors (1299304585).

16890959423 is a wasteful number, since it uses less digits than its factorization.

16890959423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299304584.

The product of its (nonzero) digits is 4199040, while the sum is 56.

The spelling of 16890959423 in words is "sixteen billion, eight hundred ninety million, nine hundred fifty-nine thousand, four hundred twenty-three".