2001200020 has 12 divisors (see below), whose sum is σ = 4202520084. Its totient is φ = 800480000.

The previous prime is 2001200011. The next prime is 2001200039. The reversal of 2001200020 is 200021002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1568476816 + 432723204 = 39604^2 + 20802^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001199976 and 2001200012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50029981 + ... + 50030020.

It is an arithmetic number, because the mean of its divisors is an integer number (350210007).

Almost surely, 2^2001200020 is an apocalyptic number.

2001200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001200020 is an abundant number, since it is smaller than the sum of its proper divisors (2201320064).

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

2001200020 is a wasteful number, since it uses less digits than its factorization.

2001200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100060010 (or 100060008 counting only the distinct ones).

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

The square root of 2001200020 is about 44734.7741695429. The cubic root of 2001200020 is about 1260.1729879229.

Adding to 2001200020 its reverse (200021002), we get a palindrome (2201221022).

The spelling of 2001200020 in words is "two billion, one million, two hundred thousand, twenty".