30985889819 has 2 divisors, whose sum is σ = 30985889820. Its totient is φ = 30985889818.

The previous prime is 30985889813. The next prime is 30985889839. The reversal of 30985889819 is 91898858903.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30985889819 - 2⁸ = 30985889563 is a prime.

It is a super-2 number, since 2×30985889819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30985889813) 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, 15492944909 + 15492944910.

It is an arithmetic number, because the mean of its divisors is an integer number (15492944910).

Almost surely, 2^30985889819 is an apocalyptic number.

30985889819 is a deficient number, since it is larger than the sum of its proper divisors (1).

30985889819 is an equidigital number, since it uses as much as digits as its factorization.

30985889819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44789760, while the sum is 68.

The spelling of 30985889819 in words is "thirty billion, nine hundred eighty-five million, eight hundred eighty-nine thousand, eight hundred nineteen".