2020867657 has 2 divisors, whose sum is σ = 2020867658. Its totient is φ = 2020867656.

The previous prime is 2020867631. The next prime is 2020867661. The reversal of 2020867657 is 7567680202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1835608336 + 185259321 = 42844^2 + 13611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020867657 - 2⁷ = 2020867529 is a prime.

It is not a weakly prime, because it can be changed into another prime (2020867357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010433828 + 1010433829.

It is an arithmetic number, because the mean of its divisors is an integer number (1010433829).

Almost surely, 2^2020867657 is an apocalyptic number.

It is an amenable number.

2020867657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020867657 is an equidigital number, since it uses as much as digits as its factorization.

2020867657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 2020867657 is about 44954.0616296236. The cubic root of 2020867657 is about 1264.2878308977.

The spelling of 2020867657 in words is "two billion, twenty million, eight hundred sixty-seven thousand, six hundred fifty-seven".