20041569 has 12 divisors (see below), whose sum is σ = 29622736. Its totient is φ = 13050072.

The previous prime is 20041537. The next prime is 20041573. The reversal of 20041569 is 96514002.

It is not a de Polignac number, because 20041569 - 2⁵ = 20041537 is a prime.

It is a super-2 number, since 2×20041569² = 803328975963522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20041369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25507 + ... + 26280.

Almost surely, 2^20041569 is an apocalyptic number.

It is an amenable number.

20041569 is a deficient number, since it is larger than the sum of its proper divisors (9581167).

20041569 is a wasteful number, since it uses less digits than its factorization.

20041569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51836 (or 51833 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20041569 is about 4476.7810980659. The cubic root of 20041569 is about 271.6296908956.

The spelling of 20041569 in words is "twenty million, forty-one thousand, five hundred sixty-nine".