30748794521 has 2 divisors, whose sum is σ = 30748794522. Its totient is φ = 30748794520.

The previous prime is 30748794509. The next prime is 30748794529. The reversal of 30748794521 is 12549784703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21745631296 + 9003163225 = 147464^2 + 94885^2 .

It is a cyclic number.

It is not a de Polignac number, because 30748794521 - 2¹⁸ = 30748532377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30748794521.

It is not a weakly prime, because it can be changed into another prime (30748794529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15374397260 + 15374397261.

It is an arithmetic number, because the mean of its divisors is an integer number (15374397261).

Almost surely, 2^30748794521 is an apocalyptic number.

It is an amenable number.

30748794521 is a deficient number, since it is larger than the sum of its proper divisors (1).

30748794521 is an equidigital number, since it uses as much as digits as its factorization.

30748794521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 30748794521 in words is "thirty billion, seven hundred forty-eight million, seven hundred ninety-four thousand, five hundred twenty-one".