30021793383557 has 2 divisors, whose sum is σ = 30021793383558. Its totient is φ = 30021793383556.

The previous prime is 30021793383553. The next prime is 30021793383587. The reversal of 30021793383557 is 75538339712003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17394246350881 + 12627547032676 = 4170641^2 + 3553526^2 .

It is a cyclic number.

It is not a de Polignac number, because 30021793383557 - 2² = 30021793383553 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30021793383551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15010896691778 + 15010896691779.

It is an arithmetic number, because the mean of its divisors is an integer number (15010896691779).

Almost surely, 2^{30021793383557} is an apocalyptic number.

It is an amenable number.

30021793383557 is a deficient number, since it is larger than the sum of its proper divisors (1).

30021793383557 is an equidigital number, since it uses as much as digits as its factorization.

30021793383557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14288400, while the sum is 56.

The spelling of 30021793383557 in words is "thirty trillion, twenty-one billion, seven hundred ninety-three million, three hundred eighty-three thousand, five hundred fifty-seven".