30820825906 has 16 divisors (see below), whose sum is σ = 49798085400. Its totient is φ = 14221968768.

The previous prime is 30820825873. The next prime is 30820825933. The reversal of 30820825906 is 60952802803.

It can be written as a sum of positive squares in 4 ways, for example, as 16290693225 + 14530132681 = 127635^2 + 120541^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750 + ... + 248278.

Almost surely, 2^30820825906 is an apocalyptic number.

30820825906 is a deficient number, since it is larger than the sum of its proper divisors (18977259494).

30820825906 is a wasteful number, since it uses less digits than its factorization.

30820825906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252333.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 30820825906 in words is "thirty billion, eight hundred twenty million, eight hundred twenty-five thousand, nine hundred six".