210000002020 has 24 divisors (see below), whose sum is σ = 456206902200. Its totient is φ = 81103448832.

The previous prime is 210000001999. The next prime is 210000002059. The reversal of 210000002020 is 20200000012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26916996096 + 183083005924 = 164064^2 + 427882^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210000001994 and 210000002012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181033905 + ... + 181035064.

It is an arithmetic number, because the mean of its divisors is an integer number (19008620925).

Almost surely, 2^210000002020 is an apocalyptic number.

210000002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210000002020 is an abundant number, since it is smaller than the sum of its proper divisors (246206900180).

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

210000002020 is a wasteful number, since it uses less digits than its factorization.

210000002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362069007 (or 362069005 counting only the distinct ones).

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

Adding to 210000002020 its reverse (20200000012), we get a palindrome (230200002032).

The spelling of 210000002020 in words is "two hundred ten billion, two thousand, twenty".