2000001800 has 48 divisors (see below), whose sum is σ = 4852189440. Its totient is φ = 765216320.

The previous prime is 2000001743. The next prime is 2000001821. The reversal of 2000001800 is 81000002.

2000001800 is a modest number, since divided by 1800 gives 200 as remainder.

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, 212792 + ... + 221991.

It is an arithmetic number, because the mean of its divisors is an integer number (101087280).

Almost surely, 2^2000001800 is an apocalyptic number.

2000001800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2000001800 is an abundant number, since it is smaller than the sum of its proper divisors (2852187640).

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

2000001800 is a wasteful number, since it uses less digits than its factorization.

2000001800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434822 (or 434813 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2000001800 is about 44721.3796746031. The cubic root of 2000001800 is about 1259.9214278711.

Adding to 2000001800 its reverse (81000002), we get a palindrome (2081001802).

The spelling of 2000001800 in words is "two billion, one thousand, eight hundred".