2020243999 has 2 divisors, whose sum is σ = 2020244000. Its totient is φ = 2020243998.

The previous prime is 2020243937. The next prime is 2020244021. The reversal of 2020243999 is 9993420202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2020243999 - 2⁹ = 2020243487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020241999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010121999 + 1010122000.

It is an arithmetic number, because the mean of its divisors is an integer number (1010122000).

Almost surely, 2^2020243999 is an apocalyptic number.

2020243999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020243999 is an equidigital number, since it uses as much as digits as its factorization.

2020243999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 2020243999 is about 44947.1244797707. The cubic root of 2020243999 is about 1264.1577606376.

The spelling of 2020243999 in words is "two billion, twenty million, two hundred forty-three thousand, nine hundred ninety-nine".