2020001000020 has 24 divisors (see below), whose sum is σ = 4250336113800. Its totient is φ = 806412968832.

The previous prime is 2020001000009. The next prime is 2020001000021. The reversal of 2020001000020 is 200001000202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1080028091536 + 939972908484 = 1039244^2 + 969522^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2020000999967 and 2020001000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020001000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99204015 + ... + 99224374.

It is an arithmetic number, because the mean of its divisors is an integer number (177097338075).

Almost surely, 2^{2020001000020} is an apocalyptic number.

2020001000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2020001000020 is an abundant number, since it is smaller than the sum of its proper divisors (2230335113780).

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

2020001000020 is a wasteful number, since it uses less digits than its factorization.

2020001000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198428907 (or 198428905 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 2020001000020 its reverse (200001000202), we get a palindrome (2220002000222).

The spelling of 2020001000020 in words is "two trillion, twenty billion, one million, twenty", and thus it is an aban number and an uban number.