20020299989 has 2 divisors, whose sum is σ = 20020299990. Its totient is φ = 20020299988.

The previous prime is 20020299961. The next prime is 20020300007. The reversal of 20020299989 is 98999202002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14460062500 + 5560237489 = 120250^2 + 74567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020299989 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 (20020299389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010149994 + 10010149995.

It is an arithmetic number, because the mean of its divisors is an integer number (10010149995).

Almost surely, 2^20020299989 is an apocalyptic number.

It is an amenable number.

20020299989 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020299989 is an equidigital number, since it uses as much as digits as its factorization.

20020299989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 20020299989 in words is "twenty billion, twenty million, two hundred ninety-nine thousand, nine hundred eighty-nine".