30403426021 has 2 divisors, whose sum is σ = 30403426022. Its totient is φ = 30403426020.

The previous prime is 30403426019. The next prime is 30403426037. The reversal of 30403426021 is 12062430403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17112564225 + 13290861796 = 130815^2 + 115286^2 .

It is an emirp because it is prime and its reverse (12062430403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30403426021 - 2¹ = 30403426019 is a prime.

Together with 30403426019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30403426051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15201713010 + 15201713011.

It is an arithmetic number, because the mean of its divisors is an integer number (15201713011).

Almost surely, 2^30403426021 is an apocalyptic number.

It is an amenable number.

30403426021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30403426021 is an equidigital number, since it uses as much as digits as its factorization.

30403426021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 30403426021 its reverse (12062430403), we get a palindrome (42465856424).

The spelling of 30403426021 in words is "thirty billion, four hundred three million, four hundred twenty-six thousand, twenty-one".