10020020977 has 2 divisors, whose sum is σ = 10020020978. Its totient is φ = 10020020976.

The previous prime is 10020020921. The next prime is 10020020993. The reversal of 10020020977 is 77902002001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6576561216 + 3443459761 = 81096^2 + 58681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10020020977 is a prime.

It is not a weakly prime, because it can be changed into another prime (10020060977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010010488 + 5010010489.

It is an arithmetic number, because the mean of its divisors is an integer number (5010010489).

Almost surely, 2^10020020977 is an apocalyptic number.

It is an amenable number.

10020020977 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020020977 is an equidigital number, since it uses as much as digits as its factorization.

10020020977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 28.

Adding to 10020020977 its reverse (77902002001), we get a palindrome (87922022978).

The spelling of 10020020977 in words is "ten billion, twenty million, twenty thousand, nine hundred seventy-seven".