2013021020 has 24 divisors (see below), whose sum is σ = 4236613584. Its totient is φ = 803442816.

The previous prime is 2013021011. The next prime is 2013021061. The reversal of 2013021020 is 201203102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2013020992 and 2013021010.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 100982 + ... + 119261.

It is an arithmetic number, because the mean of its divisors is an integer number (176525566).

Almost surely, 2^2013021020 is an apocalyptic number.

2013021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2013021020 is an abundant number, since it is smaller than the sum of its proper divisors (2223592564).

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

2013021020 is a wasteful number, since it uses less digits than its factorization.

2013021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220709 (or 220707 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2013021020 is about 44866.7027984005. The cubic root of 2013021020 is about 1262.6493803573.

Adding to 2013021020 its reverse (201203102), we get a palindrome (2214224122).

The spelling of 2013021020 in words is "two billion, thirteen million, twenty-one thousand, twenty".