20202120089 has 2 divisors, whose sum is σ = 20202120090. Its totient is φ = 20202120088.

The previous prime is 20202120049. The next prime is 20202120137. The reversal of 20202120089 is 98002120202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12874760089 + 7327360000 = 113467^2 + 85600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202120089 is a prime.

It is a super-3 number, since 3×20202120089³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20202120019) 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, 10101060044 + 10101060045.

It is an arithmetic number, because the mean of its divisors is an integer number (10101060045).

Almost surely, 2^20202120089 is an apocalyptic number.

It is an amenable number.

20202120089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202120089 is an equidigital number, since it uses as much as digits as its factorization.

20202120089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 20202120089 in words is "twenty billion, two hundred two million, one hundred twenty thousand, eighty-nine".