2001232020 has 48 divisors (see below), whose sum is σ = 5624172288. Its totient is φ = 531688320.

The previous prime is 2001231989. The next prime is 2001232069. The reversal of 2001232020 is 202321002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2001231987 and 2001232005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45279 + ... + 77798.

It is an arithmetic number, because the mean of its divisors is an integer number (117170256).

Almost surely, 2^2001232020 is an apocalyptic number.

2001232020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001232020 is an abundant number, since it is smaller than the sum of its proper divisors (3622940268).

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

2001232020 is a wasteful number, since it uses less digits than its factorization.

2001232020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123360 (or 123358 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2001232020 is about 44735.1318317047. The cubic root of 2001232020 is about 1260.1797047795.

Adding to 2001232020 its reverse (202321002), we get a palindrome (2203553022).

The spelling of 2001232020 in words is "two billion, one million, two hundred thirty-two thousand, twenty".