20186370613 has 4 divisors (see below), whose sum is σ = 20314946380. Its totient is φ = 20057794848.

The previous prime is 20186370599. The next prime is 20186370629. The reversal of 20186370613 is 31607368102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6082908049 + 14103462564 = 77993^2 + 118758^2 .

It is a cyclic number.

It is not a de Polignac number, because 20186370613 - 2⁹ = 20186370101 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 (20186370653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64287648 + ... + 64287961.

It is an arithmetic number, because the mean of its divisors is an integer number (5078736595).

Almost surely, 2^20186370613 is an apocalyptic number.

It is an amenable number.

20186370613 is a deficient number, since it is larger than the sum of its proper divisors (128575767).

20186370613 is a wasteful number, since it uses less digits than its factorization.

20186370613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128575766.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 20186370613 in words is "twenty billion, one hundred eighty-six million, three hundred seventy thousand, six hundred thirteen".