306741605021 has 2 divisors, whose sum is σ = 306741605022. Its totient is φ = 306741605020.

The previous prime is 306741605017. The next prime is 306741605041. The reversal of 306741605021 is 120506147603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257798892121 + 48942712900 = 507739^2 + 221230^2 .

It is a cyclic number.

It is not a de Polignac number, because 306741605021 - 2² = 306741605017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306741605011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153370802510 + 153370802511.

It is an arithmetic number, because the mean of its divisors is an integer number (153370802511).

Almost surely, 2^306741605021 is an apocalyptic number.

It is an amenable number.

306741605021 is a deficient number, since it is larger than the sum of its proper divisors (1).

306741605021 is an equidigital number, since it uses as much as digits as its factorization.

306741605021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 306741605021 in words is "three hundred six billion, seven hundred forty-one million, six hundred five thousand, twenty-one".