30123020009 has 2 divisors, whose sum is σ = 30123020010. Its totient is φ = 30123020008.

The previous prime is 30123019987. The next prime is 30123020047. The reversal of 30123020009 is 90002032103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23325841984 + 6797178025 = 152728^2 + 82445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30123020009 is a prime.

It is a super-2 number, since 2×30123020009² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30123020309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15061510004 + 15061510005.

It is an arithmetic number, because the mean of its divisors is an integer number (15061510005).

Almost surely, 2^30123020009 is an apocalyptic number.

It is an amenable number.

30123020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

30123020009 is an equidigital number, since it uses as much as digits as its factorization.

30123020009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The spelling of 30123020009 in words is "thirty billion, one hundred twenty-three million, twenty thousand, nine".