2000021020 has 48 divisors (see below), whose sum is σ = 4273855488. Its totient is φ = 786012480.

The previous prime is 2000021011. The next prime is 2000021029. The reversal of 2000021020 is 201200002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2000021011) and next prime (2000021029).

It is a junction number, because it is equal to n+sod(n) for n = 2000020994 and 2000021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000021029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575809 + ... + 579271.

It is an arithmetic number, because the mean of its divisors is an integer number (89038656).

Almost surely, 2^2000021020 is an apocalyptic number.

2000021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2000021020 is an abundant number, since it is smaller than the sum of its proper divisors (2273834468).

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

2000021020 is a wasteful number, since it uses less digits than its factorization.

2000021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970 (or 3968 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 2000021020 is about 44721.5945601227. The cubic root of 2000021020 is about 1259.9254638028.

Adding to 2000021020 its reverse (201200002), we get a palindrome (2201221022).

The spelling of 2000021020 in words is "two billion, twenty-one thousand, twenty".