30442383821 has 2 divisors, whose sum is σ = 30442383822. Its totient is φ = 30442383820.

The previous prime is 30442383791. The next prime is 30442383827. The reversal of 30442383821 is 12838324403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28329602596 + 2112781225 = 168314^2 + 45965^2 .

It is an emirp because it is prime and its reverse (12838324403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30442383821 - 2¹⁰ = 30442382797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30442383827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15221191910 + 15221191911.

It is an arithmetic number, because the mean of its divisors is an integer number (15221191911).

Almost surely, 2^30442383821 is an apocalyptic number.

It is an amenable number.

30442383821 is a deficient number, since it is larger than the sum of its proper divisors (1).

30442383821 is an equidigital number, since it uses as much as digits as its factorization.

30442383821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 30442383821 in words is "thirty billion, four hundred forty-two million, three hundred eighty-three thousand, eight hundred twenty-one".