16987895423 has 4 divisors (see below), whose sum is σ = 16990779168. Its totient is φ = 16985011680.

The previous prime is 16987895411. The next prime is 16987895453. The reversal of 16987895423 is 32459878961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32459878961 = 991 ⋅32754671.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16987895423 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 (16987895453) 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, 1433018 + ... + 1444823.

It is an arithmetic number, because the mean of its divisors is an integer number (4247694792).

Almost surely, 2^16987895423 is an apocalyptic number.

16987895423 is a deficient number, since it is larger than the sum of its proper divisors (2883745).

16987895423 is an equidigital number, since it uses as much as digits as its factorization.

16987895423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883744.

The product of its digits is 26127360, while the sum is 62.

The spelling of 16987895423 in words is "sixteen billion, nine hundred eighty-seven million, eight hundred ninety-five thousand, four hundred twenty-three".