188493223919 has 64 divisors (see below), whose sum is σ = 259996843008. Its totient is φ = 133016906880.

The previous prime is 188493223913. The next prime is 188493223937. The reversal of 188493223919 is 919322394881.

It is a de Polignac number, because none of the positive numbers 2^k-188493223919 is a prime.

It is a super-2 number, since 2×188493223919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188493223913) 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 63 ways as a sum of consecutive naturals, for example, 6404732 + ... + 6434094.

It is an arithmetic number, because the mean of its divisors is an integer number (4062450672).

Almost surely, 2^188493223919 is an apocalyptic number.

188493223919 is a deficient number, since it is larger than the sum of its proper divisors (71503619089).

188493223919 is a wasteful number, since it uses less digits than its factorization.

188493223919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29469 (or 29447 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 59.

The spelling of 188493223919 in words is "one hundred eighty-eight billion, four hundred ninety-three million, two hundred twenty-three thousand, nine hundred nineteen".