30197820871 has 2 divisors, whose sum is σ = 30197820872. Its totient is φ = 30197820870.

The previous prime is 30197820857. The next prime is 30197820883. The reversal of 30197820871 is 17802879103.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30197820871 - 2¹³ = 30197812679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30197820271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15098910435 + 15098910436.

It is an arithmetic number, because the mean of its divisors is an integer number (15098910436).

Almost surely, 2^30197820871 is an apocalyptic number.

30197820871 is a deficient number, since it is larger than the sum of its proper divisors (1).

30197820871 is an equidigital number, since it uses as much as digits as its factorization.

30197820871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 30197820871 in words is "thirty billion, one hundred ninety-seven million, eight hundred twenty thousand, eight hundred seventy-one".