188493423919 has 4 divisors (see below), whose sum is σ = 188494336240. Its totient is φ = 188492511600.

The previous prime is 188493423913. The next prime is 188493423997. The reversal of 188493423919 is 919324394881.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 188493423919 - 2⁵ = 188493423887 is a prime.

It is a super-2 number, since 2×188493423919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188493423913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18142 + ... + 614260.

It is an arithmetic number, because the mean of its divisors is an integer number (47123584060).

Almost surely, 2^188493423919 is an apocalyptic number.

188493423919 is a deficient number, since it is larger than the sum of its proper divisors (912321).

188493423919 is an equidigital number, since it uses as much as digits as its factorization.

188493423919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912320.

The product of its digits is 13436928, while the sum is 61.

The spelling of 188493423919 in words is "one hundred eighty-eight billion, four hundred ninety-three million, four hundred twenty-three thousand, nine hundred nineteen".