20003057797 has 2 divisors, whose sum is σ = 20003057798. Its totient is φ = 20003057796.

The previous prime is 20003057783. The next prime is 20003057831. The reversal of 20003057797 is 79775030002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14094675841 + 5908381956 = 118721^2 + 76866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003057797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003057717) 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, 10001528898 + 10001528899.

It is an arithmetic number, because the mean of its divisors is an integer number (10001528899).

Almost surely, 2^20003057797 is an apocalyptic number.

It is an amenable number.

20003057797 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003057797 is an equidigital number, since it uses as much as digits as its factorization.

20003057797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92610, while the sum is 40.

Adding to 20003057797 its reverse (79775030002), we get a palindrome (99778087799).

The spelling of 20003057797 in words is "twenty billion, three million, fifty-seven thousand, seven hundred ninety-seven".