2020209985 has 8 divisors (see below), whose sum is σ = 2431999080. Its totient is φ = 1611003264.

The previous prime is 2020209959. The next prime is 2020210013. The reversal of 2020209985 is 5899020202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 191877904 + 1828332081 = 13852^2 + 42759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2020209985 - 2⁷ = 2020209857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 643870 + ... + 646999.

It is an arithmetic number, because the mean of its divisors is an integer number (303999885).

Almost surely, 2^2020209985 is an apocalyptic number.

It is an amenable number.

2020209985 is a deficient number, since it is larger than the sum of its proper divisors (411789095).

2020209985 is a wasteful number, since it uses less digits than its factorization.

2020209985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291187.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 2020209985 is about 44946.7461002462. The cubic root of 2020209985 is about 1264.1506659000.

The spelling of 2020209985 in words is "two billion, twenty million, two hundred nine thousand, nine hundred eighty-five".