30071821613 has 2 divisors, whose sum is σ = 30071821614. Its totient is φ = 30071821612.

The previous prime is 30071821597. The next prime is 30071821649. The reversal of 30071821613 is 31612817003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22578668644 + 7493152969 = 150262^2 + 86563^2 .

It is a cyclic number.

It is not a de Polignac number, because 30071821613 - 2⁴ = 30071821597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30071821613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30071821673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15035910806 + 15035910807.

It is an arithmetic number, because the mean of its divisors is an integer number (15035910807).

Almost surely, 2^30071821613 is an apocalyptic number.

It is an amenable number.

30071821613 is a deficient number, since it is larger than the sum of its proper divisors (1).

30071821613 is an equidigital number, since it uses as much as digits as its factorization.

30071821613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 30071821613 in words is "thirty billion, seventy-one million, eight hundred twenty-one thousand, six hundred thirteen".