20321302987 has 2 divisors, whose sum is σ = 20321302988. Its totient is φ = 20321302986.

The previous prime is 20321302979. The next prime is 20321303011. The reversal of 20321302987 is 78920312302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20321302987 - 2³ = 20321302979 is a prime.

It is not a weakly prime, because it can be changed into another prime (20321302387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160651493 + 10160651494.

It is an arithmetic number, because the mean of its divisors is an integer number (10160651494).

Almost surely, 2^20321302987 is an apocalyptic number.

20321302987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321302987 is an equidigital number, since it uses as much as digits as its factorization.

20321302987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 20321302987 in words is "twenty billion, three hundred twenty-one million, three hundred two thousand, nine hundred eighty-seven".