2001333220 has 12 divisors (see below), whose sum is σ = 4202799804. Its totient is φ = 800533280.

The previous prime is 2001333203. The next prime is 2001333223. The reversal of 2001333220 is 223331002.

It can be written as a sum of positive squares in 2 ways, for example, as 362217024 + 1639116196 = 19032^2 + 40486^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001333194 and 2001333203.

It is not an unprimeable number, because it can be changed into a prime (2001333223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50033311 + ... + 50033350.

It is an arithmetic number, because the mean of its divisors is an integer number (350233317).

Almost surely, 2^2001333220 is an apocalyptic number.

2001333220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001333220 is an abundant number, since it is smaller than the sum of its proper divisors (2201466584).

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

2001333220 is a wasteful number, since it uses less digits than its factorization.

2001333220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100066670 (or 100066668 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 2001333220 is about 44736.2629194706. The cubic root of 2001333220 is about 1260.2009463672.

Adding to 2001333220 its reverse (223331002), we get a palindrome (2224664222).

The spelling of 2001333220 in words is "two billion, one million, three hundred thirty-three thousand, two hundred twenty".