20001202189 has 2 divisors, whose sum is σ = 20001202190. Its totient is φ = 20001202188.

The previous prime is 20001202181. The next prime is 20001202213. The reversal of 20001202189 is 98120210002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19408669225 + 592532964 = 139315^2 + 24342^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001202189 - 2³ = 20001202181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001202181) 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, 10000601094 + 10000601095.

It is an arithmetic number, because the mean of its divisors is an integer number (10000601095).

Almost surely, 2^20001202189 is an apocalyptic number.

It is an amenable number.

20001202189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001202189 is an equidigital number, since it uses as much as digits as its factorization.

20001202189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 20001202189 in words is "twenty billion, one million, two hundred two thousand, one hundred eighty-nine".