20522069 has 2 divisors, whose sum is σ = 20522070. Its totient is φ = 20522068.

The previous prime is 20522059. The next prime is 20522083. The reversal of 20522069 is 96022502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18232900 + 2289169 = 4270^2 + 1513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20522069 is a prime.

It is a super-2 number, since 2×20522069² = 842310632081522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_1301588 and since 20522069 and 1301588 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20522039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261034 + 10261035.

It is an arithmetic number, because the mean of its divisors is an integer number (10261035).

Almost surely, 2^20522069 is an apocalyptic number.

It is an amenable number.

20522069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20522069 is an equidigital number, since it uses as much as digits as its factorization.

20522069 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 20522069 is about 4530.1290268601. The cubic root of 20522069 is about 273.7833592229.

The spelling of 20522069 in words is "twenty million, five hundred twenty-two thousand, sixty-nine".