30030019991 has 2 divisors, whose sum is σ = 30030019992. Its totient is φ = 30030019990.

The previous prime is 30030019979. The next prime is 30030020017. The reversal of 30030019991 is 19991003003.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30030019991 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30030019931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15015009995 + 15015009996.

It is an arithmetic number, because the mean of its divisors is an integer number (15015009996).

Almost surely, 2^30030019991 is an apocalyptic number.

30030019991 is a deficient number, since it is larger than the sum of its proper divisors (1).

30030019991 is an equidigital number, since it uses as much as digits as its factorization.

30030019991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6561, while the sum is 35.

The spelling of 30030019991 in words is "thirty billion, thirty million, nineteen thousand, nine hundred ninety-one".