202020 has 96 divisors (see below), whose sum is σ = 715008. Its totient is φ = 41472.

The previous prime is 202001. The next prime is 202021. The reversal of 202020 is 20202.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

202020 is an undulating number in base 10.

202020 is a modest number, since divided by 2020 gives 20 as remainder.

It is not an unprimeable number, because it can be changed into a prime (202021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5442 + ... + 5478.

It is an arithmetic number, because the mean of its divisors is an integer number (7448).

2²⁰²⁰²⁰ is an apocalyptic number.

202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357504).

202020 is an abundant number, since it is smaller than the sum of its proper divisors (512988).

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

202020 is a wasteful number, since it uses less digits than its factorization.

202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 6.

The square root of 202020 is about 449.4663502422. The cubic root of 202020 is about 58.6765794774.

Adding to 202020 its reverse (20202), we get a palindrome (222222).

The spelling of 202020 in words is "two hundred two thousand, twenty", and thus it is an iban number.