306504796021 has 2 divisors, whose sum is σ = 306504796022. Its totient is φ = 306504796020.

The previous prime is 306504796009. The next prime is 306504796043. The reversal of 306504796021 is 120697405603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233782887121 + 72721908900 = 483511^2 + 269670^2 .

It is a cyclic number.

It is not a de Polignac number, because 306504796021 - 2³⁷ = 169065842549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306504796001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153252398010 + 153252398011.

It is an arithmetic number, because the mean of its divisors is an integer number (153252398011).

Almost surely, 2^306504796021 is an apocalyptic number.

It is an amenable number.

306504796021 is a deficient number, since it is larger than the sum of its proper divisors (1).

306504796021 is an equidigital number, since it uses as much as digits as its factorization.

306504796021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 306504796021 in words is "three hundred six billion, five hundred four million, seven hundred ninety-six thousand, twenty-one".