2001819201 has 16 divisors (see below), whose sum is σ = 2720329920. Its totient is φ = 1309027520.

The previous prime is 2001819181. The next prime is 2001819229. The reversal of 2001819201 is 1029181002.

It is a cyclic number.

It is not a de Polignac number, because 2001819201 - 2²⁷ = 1867601473 is a prime.

It is a super-2 number, since 2×2001819201² = 8014560226984556802, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001819101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69331 + ... + 93863.

It is an arithmetic number, because the mean of its divisors is an integer number (170020620).

Almost surely, 2^2001819201 is an apocalyptic number.

It is an amenable number.

2001819201 is a deficient number, since it is larger than the sum of its proper divisors (718510719).

2001819201 is a wasteful number, since it uses less digits than its factorization.

2001819201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25056.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 2001819201 is about 44741.6942124457. The cubic root of 2001819201 is about 1260.3029424007.

The spelling of 2001819201 in words is "two billion, one million, eight hundred nineteen thousand, two hundred one".