2002020989 has 2 divisors, whose sum is σ = 2002020990. Its totient is φ = 2002020988.

The previous prime is 2002020973. The next prime is 2002021001. The reversal of 2002020989 is 9890202002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1985415364 + 16605625 = 44558^2 + 4075^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002020989 - 2⁴ = 2002020973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002020949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001010494 + 1001010495.

It is an arithmetic number, because the mean of its divisors is an integer number (1001010495).

Almost surely, 2^2002020989 is an apocalyptic number.

It is an amenable number.

2002020989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002020989 is an equidigital number, since it uses as much as digits as its factorization.

2002020989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2002020989 is about 44743.9491886892. The cubic root of 2002020989 is about 1260.3452881273.

The spelling of 2002020989 in words is "two billion, two million, twenty thousand, nine hundred eighty-nine".