20000064787 has 2 divisors, whose sum is σ = 20000064788. Its totient is φ = 20000064786.

The previous prime is 20000064761. The next prime is 20000064857. The reversal of 20000064787 is 78746000002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000064787 is a prime.

It is not a weakly prime, because it can be changed into another prime (20000064757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000032393 + 10000032394.

It is an arithmetic number, because the mean of its divisors is an integer number (10000032394).

Almost surely, 2^20000064787 is an apocalyptic number.

20000064787 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000064787 is an equidigital number, since it uses as much as digits as its factorization.

20000064787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

Adding to 20000064787 its reverse (78746000002), we get a palindrome (98746064789).

The spelling of 20000064787 in words is "twenty billion, sixty-four thousand, seven hundred eighty-seven".