30994923423809 has 2 divisors, whose sum is σ = 30994923423810. Its totient is φ = 30994923423808.

The previous prime is 30994923423647. The next prime is 30994923423851. The reversal of 30994923423809 is 90832432949903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22627412621584 + 8367510802225 = 4756828^2 + 2892665^2 .

It is a cyclic number.

It is not a de Polignac number, because 30994923423809 - 2²⁴ = 30994906646593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30994923623809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15497461711904 + 15497461711905.

It is an arithmetic number, because the mean of its divisors is an integer number (15497461711905).

Almost surely, 2^{30994923423809} is an apocalyptic number.

It is an amenable number.

30994923423809 is a deficient number, since it is larger than the sum of its proper divisors (1).

30994923423809 is an equidigital number, since it uses as much as digits as its factorization.

30994923423809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90699264, while the sum is 65.

The spelling of 30994923423809 in words is "thirty trillion, nine hundred ninety-four billion, nine hundred twenty-three million, four hundred twenty-three thousand, eight hundred nine".