20013030977 has 2 divisors, whose sum is σ = 20013030978. Its totient is φ = 20013030976.

The previous prime is 20013030971. The next prime is 20013031039. The reversal of 20013030977 is 77903031002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11673505936 + 8339525041 = 108044^2 + 91321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013030977 is a prime.

It is not a weakly prime, because it can be changed into another prime (20013030971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006515488 + 10006515489.

It is an arithmetic number, because the mean of its divisors is an integer number (10006515489).

Almost surely, 2^20013030977 is an apocalyptic number.

It is an amenable number.

20013030977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013030977 is an equidigital number, since it uses as much as digits as its factorization.

20013030977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 32.

Adding to 20013030977 its reverse (77903031002), we get a palindrome (97916061979).

The spelling of 20013030977 in words is "twenty billion, thirteen million, thirty thousand, nine hundred seventy-seven".