30195139813 has 2 divisors, whose sum is σ = 30195139814. Its totient is φ = 30195139812.

The previous prime is 30195139811. The next prime is 30195139831. The reversal of 30195139813 is 31893159103.

Together with next prime (30195139831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15664524964 + 14530614849 = 125158^2 + 120543^2 .

It is a cyclic number.

It is not a de Polignac number, because 30195139813 - 2¹ = 30195139811 is a prime.

Together with 30195139811, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 30195139813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30195139811) 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 as a sum of consecutive naturals, namely, 15097569906 + 15097569907.

It is an arithmetic number, because the mean of its divisors is an integer number (15097569907).

Almost surely, 2^30195139813 is an apocalyptic number.

It is an amenable number.

30195139813 is a deficient number, since it is larger than the sum of its proper divisors (1).

30195139813 is an equidigital number, since it uses as much as digits as its factorization.

30195139813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The spelling of 30195139813 in words is "thirty billion, one hundred ninety-five million, one hundred thirty-nine thousand, eight hundred thirteen".