20003212109 has 2 divisors, whose sum is σ = 20003212110. Its totient is φ = 20003212108.

The previous prime is 20003212091. The next prime is 20003212123. The reversal of 20003212109 is 90121230002.

Together with previous prime (20003212091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18824663209 + 1178548900 = 137203^2 + 34330^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003212109 - 2⁸ = 20003211853 is a prime.

It is a Sophie Germain 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 (20003212199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001606054 + 10001606055.

It is an arithmetic number, because the mean of its divisors is an integer number (10001606055).

Almost surely, 2^20003212109 is an apocalyptic number.

It is an amenable number.

20003212109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003212109 is an equidigital number, since it uses as much as digits as its factorization.

20003212109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 20003212109 in words is "twenty billion, three million, two hundred twelve thousand, one hundred nine".