20310299987 has 2 divisors, whose sum is σ = 20310299988. Its totient is φ = 20310299986.

The previous prime is 20310299941. The next prime is 20310300019. The reversal of 20310299987 is 78999201302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20310299987 - 2¹² = 20310295891 is a prime.

It is not a weakly prime, because it can be changed into another prime (20310299917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155149993 + 10155149994.

It is an arithmetic number, because the mean of its divisors is an integer number (10155149994).

Almost surely, 2^20310299987 is an apocalyptic number.

20310299987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310299987 is an equidigital number, since it uses as much as digits as its factorization.

20310299987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 50.

The spelling of 20310299987 in words is "twenty billion, three hundred ten million, two hundred ninety-nine thousand, nine hundred eighty-seven".