201020020 has 12 divisors (see below), whose sum is σ = 422142084. Its totient is φ = 80408000.

The previous prime is 201020011. The next prime is 201020041. The reversal of 201020020 is 20020102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56010256 + 145009764 = 7484^2 + 12042^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201019985 and 201020012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5025481 + ... + 5025520.

It is an arithmetic number, because the mean of its divisors is an integer number (35178507).

Almost surely, 2^201020020 is an apocalyptic number.

201020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201020020 is an abundant number, since it is smaller than the sum of its proper divisors (221122064).

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

201020020 is a wasteful number, since it uses less digits than its factorization.

201020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051010 (or 10051008 counting only the distinct ones).

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

The square root of 201020020 is about 14178.1529121392. The cubic root of 201020020 is about 585.7960477911.

Adding to 201020020 its reverse (20020102), we get a palindrome (221040122).

The spelling of 201020020 in words is "two hundred one million, twenty thousand, twenty".