2020221999 has 16 divisors (see below), whose sum is σ = 2993616640. Its totient is φ = 1346501880.

The previous prime is 2020221977. The next prime is 2020222003. The reversal of 2020221999 is 9991220202.

It is not a de Polignac number, because 2020221999 - 2⁹ = 2020221487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020221799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207654 + ... + 217164.

It is an arithmetic number, because the mean of its divisors is an integer number (187101040).

Almost surely, 2^2020221999 is an apocalyptic number.

2020221999 is a deficient number, since it is larger than the sum of its proper divisors (973394641).

2020221999 is an equidigital number, since it uses as much as digits as its factorization.

2020221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17387 (or 17381 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 2020221999 is about 44946.8797470970. The cubic root of 2020221999 is about 1264.1531718237.

The spelling of 2020221999 in words is "two billion, twenty million, two hundred twenty-one thousand, nine hundred ninety-nine".