2020021020 has 36 divisors (see below), whose sum is σ = 6127397640. Its totient is φ = 538672224.

The previous prime is 2020021009. The next prime is 2020021057. The reversal of 2020021020 is 201200202.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2020020993 and 2020021011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5610990 + ... + 5611349.

It is an arithmetic number, because the mean of its divisors is an integer number (170205490).

Almost surely, 2^2020021020 is an apocalyptic number.

2020021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2020021020 is an abundant number, since it is smaller than the sum of its proper divisors (4107376620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2020021020 is a wasteful number, since it uses less digits than its factorization.

2020021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11222354 (or 11222349 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2020021020 is about 44944.6439523109. The cubic root of 2020021020 is about 1264.1112495884. Note that the first 3 decimals are identical.

Adding to 2020021020 its reverse (201200202), we get a palindrome (2221221222).

The spelling of 2020021020 in words is "two billion, twenty million, twenty-one thousand, twenty".