2001810 has 32 divisors (see below), whose sum is σ = 4898880. Its totient is φ = 523328.

The previous prime is 2001809. The next prime is 2001833. The reversal of 2001810 is 181002.

It is a happy number.

2001810 is nontrivially palindromic in base 9.

It is a super-2 number, since 2×2001810² = 8014486552200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 961 + ... + 2219.

It is an arithmetic number, because the mean of its divisors is an integer number (153090).

2^2001810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2449440).

2001810 is an abundant number, since it is smaller than the sum of its proper divisors (2897070).

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

2001810 is a wasteful number, since it uses less digits than its factorization.

2001810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2001810 is about 1414.8533492910. The cubic root of 2001810 is about 126.0301011480.

Adding to 2001810 its reverse (181002), we get a palindrome (2182812).

The spelling of 2001810 in words is "two million, one thousand, eight hundred ten".