30420717841 has 2 divisors, whose sum is σ = 30420717842. Its totient is φ = 30420717840.

The previous prime is 30420717823. The next prime is 30420717919. The reversal of 30420717841 is 14871702403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28799447616 + 1621270225 = 169704^2 + 40265^2 .

It is a cyclic number.

It is not a de Polignac number, because 30420717841 - 2⁹ = 30420717329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30420717841.

It is not a weakly prime, because it can be changed into another prime (30420757841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210358920 + 15210358921.

It is an arithmetic number, because the mean of its divisors is an integer number (15210358921).

Almost surely, 2^30420717841 is an apocalyptic number.

It is an amenable number.

30420717841 is a deficient number, since it is larger than the sum of its proper divisors (1).

30420717841 is an equidigital number, since it uses as much as digits as its factorization.

30420717841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 30420717841 in words is "thirty billion, four hundred twenty million, seven hundred seventeen thousand, eight hundred forty-one".