30819909091 has 2 divisors, whose sum is σ = 30819909092. Its totient is φ = 30819909090.

The previous prime is 30819909089. The next prime is 30819909097. The reversal of 30819909091 is 19090991803.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30819909091 - 2¹ = 30819909089 is a prime.

Together with 30819909089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30819909097) 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, 15409954545 + 15409954546.

It is an arithmetic number, because the mean of its divisors is an integer number (15409954546).

Almost surely, 2^30819909091 is an apocalyptic number.

30819909091 is a deficient number, since it is larger than the sum of its proper divisors (1).

30819909091 is an equidigital number, since it uses as much as digits as its factorization.

30819909091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 49.

The spelling of 30819909091 in words is "thirty billion, eight hundred nineteen million, nine hundred nine thousand, ninety-one".