2001020 has 24 divisors (see below), whose sum is σ = 4802784. Its totient is φ = 686016.

The previous prime is 2000989. The next prime is 2001037. The reversal of 2001020 is 201002.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 2000995 and 2001013.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 7007 + ... + 7286.

It is an arithmetic number, because the mean of its divisors is an integer number (200116).

2^2001020 is an apocalyptic number.

2001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001020 is an abundant number, since it is smaller than the sum of its proper divisors (2801764).

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

2001020 is a wasteful number, since it uses less digits than its factorization.

2001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14309 (or 14307 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 2001020 is about 1414.5741408636. The cubic root of 2001020 is about 126.0135200072.

Adding to 2001020 its reverse (201002), we get a palindrome (2202022).

The spelling of 2001020 in words is "two million, one thousand, twenty".