188213674813 has 2 divisors, whose sum is σ = 188213674814. Its totient is φ = 188213674812.

The previous prime is 188213674807. The next prime is 188213674903. The reversal of 188213674813 is 318476312881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164663089369 + 23550585444 = 405787^2 + 153462^2 .

It is a cyclic number.

It is not a de Polignac number, because 188213674813 - 2⁹ = 188213674301 is a prime.

It is a super-2 number, since 2×188213674813² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188213674613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94106837406 + 94106837407.

It is an arithmetic number, because the mean of its divisors is an integer number (94106837407).

Almost surely, 2^188213674813 is an apocalyptic number.

It is an amenable number.

188213674813 is a deficient number, since it is larger than the sum of its proper divisors (1).

188213674813 is an equidigital number, since it uses as much as digits as its factorization.

188213674813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 52.

The spelling of 188213674813 in words is "one hundred eighty-eight billion, two hundred thirteen million, six hundred seventy-four thousand, eight hundred thirteen".