20202210989 has 2 divisors, whose sum is σ = 20202210990. Its totient is φ = 20202210988.

The previous prime is 20202210983. The next prime is 20202211021. The reversal of 20202210989 is 98901220202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20132772100 + 69438889 = 141890^2 + 8333^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202210989 - 2⁸ = 20202210733 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 (20202210983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101105494 + 10101105495.

It is an arithmetic number, because the mean of its divisors is an integer number (10101105495).

Almost surely, 2^20202210989 is an apocalyptic number.

It is an amenable number.

20202210989 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202210989 is an equidigital number, since it uses as much as digits as its factorization.

20202210989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 20202210989 in words is "twenty billion, two hundred two million, two hundred ten thousand, nine hundred eighty-nine".