20320000487 has 2 divisors, whose sum is σ = 20320000488. Its totient is φ = 20320000486.

The previous prime is 20320000411. The next prime is 20320000523. The reversal of 20320000487 is 78400002302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20320000487 - 2¹⁶ = 20319934951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320000387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160000243 + 10160000244.

It is an arithmetic number, because the mean of its divisors is an integer number (10160000244).

Almost surely, 2^20320000487 is an apocalyptic number.

20320000487 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320000487 is an equidigital number, since it uses as much as digits as its factorization.

20320000487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 20320000487 its reverse (78400002302), we get a palindrome (98720002789).

The spelling of 20320000487 in words is "twenty billion, three hundred twenty million, four hundred eighty-seven", and thus it is an aban number.