30329736821 has 2 divisors, whose sum is σ = 30329736822. Its totient is φ = 30329736820.

The previous prime is 30329736793. The next prime is 30329736847. The reversal of 30329736821 is 12863792303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17979859921 + 12349876900 = 134089^2 + 111130^2 .

It is an emirp because it is prime and its reverse (12863792303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30329736821 - 2¹⁰ = 30329735797 is a prime.

It is a super-2 number, since 2×30329736821² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30329736881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15164868410 + 15164868411.

It is an arithmetic number, because the mean of its divisors is an integer number (15164868411).

Almost surely, 2^30329736821 is an apocalyptic number.

It is an amenable number.

30329736821 is a deficient number, since it is larger than the sum of its proper divisors (1).

30329736821 is an equidigital number, since it uses as much as digits as its factorization.

30329736821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 30329736821 in words is "thirty billion, three hundred twenty-nine million, seven hundred thirty-six thousand, eight hundred twenty-one".