2020090090 has 16 divisors (see below), whose sum is σ = 3724849800. Its totient is φ = 788327680.

The previous prime is 2020090027. The next prime is 2020090099. The reversal of 2020090090 is 900900202.

It can be written as a sum of positive squares in 4 ways, for example, as 1385402841 + 634687249 = 37221^2 + 25193^2 .

2020090090 is a modest number, since divided by 90090 gives 2020 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2020090099) 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 in 7 ways as a sum of consecutive naturals, for example, 2463115 + ... + 2463934.

Almost surely, 2^2020090090 is an apocalyptic number.

2020090090 is a deficient number, since it is larger than the sum of its proper divisors (1704759710).

2020090090 is a wasteful number, since it uses less digits than its factorization.

2020090090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4927097.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 2020090090 is about 44945.4123354097. The cubic root of 2020090090 is about 1264.1256572221.

Adding to 2020090090 its reverse (900900202), we get a palindrome (2920990292).

The spelling of 2020090090 in words is "two billion, twenty million, ninety thousand, ninety".