20003321069 has 2 divisors, whose sum is σ = 20003321070. Its totient is φ = 20003321068.

The previous prime is 20003321057. The next prime is 20003321071. The reversal of 20003321069 is 96012330002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17421360100 + 2581960969 = 131990^2 + 50813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003321069 is a prime.

It is a super-2 number, since 2×20003321069² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 20003321071, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003321869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001660534 + 10001660535.

It is an arithmetic number, because the mean of its divisors is an integer number (10001660535).

Almost surely, 2^20003321069 is an apocalyptic number.

It is an amenable number.

20003321069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003321069 is an equidigital number, since it uses as much as digits as its factorization.

20003321069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 20003321069 in words is "twenty billion, three million, three hundred twenty-one thousand, sixty-nine".