2020757657 has 2 divisors, whose sum is σ = 2020757658. Its totient is φ = 2020757656.

The previous prime is 2020757593. The next prime is 2020757663. The reversal of 2020757657 is 7567570202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1559539081 + 461218576 = 39491^2 + 21476^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020757657 - 2⁶ = 2020757593 is a prime.

It is not a weakly prime, because it can be changed into another prime (2020757957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010378828 + 1010378829.

It is an arithmetic number, because the mean of its divisors is an integer number (1010378829).

Almost surely, 2^2020757657 is an apocalyptic number.

It is an amenable number.

2020757657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020757657 is an equidigital number, since it uses as much as digits as its factorization.

2020757657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 205800, while the sum is 41.

The square root of 2020757657 is about 44952.8381417681. The cubic root of 2020757657 is about 1264.2648912156.

The spelling of 2020757657 in words is "two billion, twenty million, seven hundred fifty-seven thousand, six hundred fifty-seven".