30820825933 has 2 divisors, whose sum is σ = 30820825934. Its totient is φ = 30820825932.

The previous prime is 30820825873. The next prime is 30820825949. The reversal of 30820825933 is 33952802803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23005912329 + 7814913604 = 151677^2 + 88402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30820825933 is a prime.

It is a super-2 number, since 2×30820825933² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30820825933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30820825333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15410412966 + 15410412967.

It is an arithmetic number, because the mean of its divisors is an integer number (15410412967).

Almost surely, 2^30820825933 is an apocalyptic number.

It is an amenable number.

30820825933 is a deficient number, since it is larger than the sum of its proper divisors (1).

30820825933 is an equidigital number, since it uses as much as digits as its factorization.

30820825933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 30820825933 in words is "thirty billion, eight hundred twenty million, eight hundred twenty-five thousand, nine hundred thirty-three".