306413644021 has 2 divisors, whose sum is σ = 306413644022. Its totient is φ = 306413644020.

The previous prime is 306413644013. The next prime is 306413644111. The reversal of 306413644021 is 120446314603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266760887121 + 39652756900 = 516489^2 + 199130^2 .

It is a cyclic number.

It is not a de Polignac number, because 306413644021 - 2³ = 306413644013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306413644321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153206822010 + 153206822011.

It is an arithmetic number, because the mean of its divisors is an integer number (153206822011).

Almost surely, 2^306413644021 is an apocalyptic number.

It is an amenable number.

306413644021 is a deficient number, since it is larger than the sum of its proper divisors (1).

306413644021 is an equidigital number, since it uses as much as digits as its factorization.

306413644021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 306413644021 its reverse (120446314603), we get a palindrome (426859958624).

The spelling of 306413644021 in words is "three hundred six billion, four hundred thirteen million, six hundred forty-four thousand, twenty-one".