30813803971 has 2 divisors, whose sum is σ = 30813803972. Its totient is φ = 30813803970.

The previous prime is 30813803953. The next prime is 30813804011. The reversal of 30813803971 is 17930831803.

It is a weak prime.

It is an emirp because it is prime and its reverse (17930831803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30813803971 - 2⁷ = 30813803843 is a prime.

It is not a weakly prime, because it can be changed into another prime (30813503971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15406901985 + 15406901986.

It is an arithmetic number, because the mean of its divisors is an integer number (15406901986).

Almost surely, 2^30813803971 is an apocalyptic number.

30813803971 is a deficient number, since it is larger than the sum of its proper divisors (1).

30813803971 is an equidigital number, since it uses as much as digits as its factorization.

30813803971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 30813803971 in words is "thirty billion, eight hundred thirteen million, eight hundred three thousand, nine hundred seventy-one".