20202020999 has 2 divisors, whose sum is σ = 20202021000. Its totient is φ = 20202020998.

The previous prime is 20202020989. The next prime is 20202021017. The reversal of 20202020999 is 99902020202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20202020999 - 2³² = 15907053703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202020989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101010499 + 10101010500.

It is an arithmetic number, because the mean of its divisors is an integer number (10101010500).

Almost surely, 2^20202020999 is an apocalyptic number.

20202020999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202020999 is an equidigital number, since it uses as much as digits as its factorization.

20202020999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 20202020999 in words is "twenty billion, two hundred two million, twenty thousand, nine hundred ninety-nine".