30021031987 has 2 divisors, whose sum is σ = 30021031988. Its totient is φ = 30021031986.

The previous prime is 30021031981. The next prime is 30021032011. The reversal of 30021031987 is 78913012003.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30021031987 is a prime.

It is not a weakly prime, because it can be changed into another prime (30021031981) 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, 15010515993 + 15010515994.

It is an arithmetic number, because the mean of its divisors is an integer number (15010515994).

Almost surely, 2^30021031987 is an apocalyptic number.

30021031987 is a deficient number, since it is larger than the sum of its proper divisors (1).

30021031987 is an equidigital number, since it uses as much as digits as its factorization.

30021031987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 30021031987 in words is "thirty billion, twenty-one million, thirty-one thousand, nine hundred eighty-seven".