30242343821 has 2 divisors, whose sum is σ = 30242343822. Its totient is φ = 30242343820.

The previous prime is 30242343809. The next prime is 30242343827. The reversal of 30242343821 is 12834324203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30065826025 + 176517796 = 173395^2 + 13286^2 .

It is an emirp because it is prime and its reverse (12834324203) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30242343821 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30242343827) 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, 15121171910 + 15121171911.

It is an arithmetic number, because the mean of its divisors is an integer number (15121171911).

Almost surely, 2^30242343821 is an apocalyptic number.

It is an amenable number.

30242343821 is a deficient number, since it is larger than the sum of its proper divisors (1).

30242343821 is an equidigital number, since it uses as much as digits as its factorization.

30242343821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 30242343821 in words is "thirty billion, two hundred forty-two million, three hundred forty-three thousand, eight hundred twenty-one".