4000020569 has 2 divisors, whose sum is σ = 4000020570. Its totient is φ = 4000020568.

The previous prime is 4000020523. The next prime is 4000020571. The reversal of 4000020569 is 9650200004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3038214400 + 961806169 = 55120^2 + 31013^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000020569 - 2²⁰ = 3998971993 is a prime.

It is a super-2 number, since 2×4000020569² = 32000329104846167522, which contains 22 as substring.

Together with 4000020571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4000020589) 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, 2000010284 + 2000010285.

It is an arithmetic number, because the mean of its divisors is an integer number (2000010285).

Almost surely, 2^4000020569 is an apocalyptic number.

It is an amenable number.

4000020569 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000020569 is an equidigital number, since it uses as much as digits as its factorization.

4000020569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 4000020569 is about 63245.7158153815. The cubic root of 4000020569 is about 1587.4037729012.

The spelling of 4000020569 in words is "four billion, twenty thousand, five hundred sixty-nine".