2001800219 has 4 divisors (see below), whose sum is σ = 2001902280. Its totient is φ = 2001698160.

The previous prime is 2001800209. The next prime is 2001800257. The reversal of 2001800219 is 9120081002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001800219 is a prime.

It is a super-2 number, since 2×2001800219² = 8014408233576895922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001800194 and 2001800203.

It is not an unprimeable number, because it can be changed into a prime (2001800209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11297 + ... + 64274.

It is an arithmetic number, because the mean of its divisors is an integer number (500475570).

Almost surely, 2^2001800219 is an apocalyptic number.

2001800219 is a deficient number, since it is larger than the sum of its proper divisors (102061).

2001800219 is an equidigital number, since it uses as much as digits as its factorization.

2001800219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102060.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2001800219 is about 44741.4820831854. The cubic root of 2001800219 is about 1260.2989588332.

The spelling of 2001800219 in words is "two billion, one million, eight hundred thousand, two hundred nineteen".