20057069 has 2 divisors, whose sum is σ = 20057070. Its totient is φ = 20057068.

The previous prime is 20057047. The next prime is 20057083. The reversal of 20057069 is 96075002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14478025 + 5579044 = 3805^2 + 2362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20057069 is a prime.

It is a super-2 number, since 2×20057069² = 804572033741522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20057029) 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 as a sum of consecutive naturals, namely, 10028534 + 10028535.

It is an arithmetic number, because the mean of its divisors is an integer number (10028535).

Almost surely, 2^20057069 is an apocalyptic number.

It is an amenable number.

20057069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20057069 is an equidigital number, since it uses as much as digits as its factorization.

20057069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20057069 is about 4478.5119180371. The cubic root of 20057069 is about 271.6996983100.

The spelling of 20057069 in words is "twenty million, fifty-seven thousand, sixty-nine".