2021982757 has 2 divisors, whose sum is σ = 2021982758. Its totient is φ = 2021982756.

The previous prime is 2021982733. The next prime is 2021982763. The reversal of 2021982757 is 7572891202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1800389761 + 221592996 = 42431^2 + 14886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021982757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021982797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010991378 + 1010991379.

It is an arithmetic number, because the mean of its divisors is an integer number (1010991379).

Almost surely, 2^2021982757 is an apocalyptic number.

It is an amenable number.

2021982757 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021982757 is an equidigital number, since it uses as much as digits as its factorization.

2021982757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 2021982757 is about 44966.4625804610. The cubic root of 2021982757 is about 1264.5203297335.

The spelling of 2021982757 in words is "two billion, twenty-one million, nine hundred eighty-two thousand, seven hundred fifty-seven".