30681503987 has 2 divisors, whose sum is σ = 30681503988. Its totient is φ = 30681503986.

The previous prime is 30681503971. The next prime is 30681504011. The reversal of 30681503987 is 78930518603.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30681503987 - 2⁴ = 30681503971 is a prime.

It is not a weakly prime, because it can be changed into another prime (30681503917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15340751993 + 15340751994.

It is an arithmetic number, because the mean of its divisors is an integer number (15340751994).

Almost surely, 2^30681503987 is an apocalyptic number.

30681503987 is a deficient number, since it is larger than the sum of its proper divisors (1).

30681503987 is an equidigital number, since it uses as much as digits as its factorization.

30681503987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 30681503987 in words is "thirty billion, six hundred eighty-one million, five hundred three thousand, nine hundred eighty-seven".