30191862091 has 2 divisors, whose sum is σ = 30191862092. Its totient is φ = 30191862090.

The previous prime is 30191862083. The next prime is 30191862119. The reversal of 30191862091 is 19026819103.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30191862091 - 2³ = 30191862083 is a prime.

It is not a weakly prime, because it can be changed into another prime (30191862791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15095931045 + 15095931046.

It is an arithmetic number, because the mean of its divisors is an integer number (15095931046).

Almost surely, 2^30191862091 is an apocalyptic number.

30191862091 is a deficient number, since it is larger than the sum of its proper divisors (1).

30191862091 is an equidigital number, since it uses as much as digits as its factorization.

30191862091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 30191862091 in words is "thirty billion, one hundred ninety-one million, eight hundred sixty-two thousand, ninety-one".