10020020 has 12 divisors (see below), whose sum is σ = 21042084. Its totient is φ = 4008000.

The previous prime is 10020013. The next prime is 10020041. The reversal of 10020020 is 2002001.

It can be written as a sum of positive squares in 2 ways, for example, as 1008016 + 9012004 = 1004^2 + 3002^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 10019986 and 10020013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250481 + ... + 250520.

It is an arithmetic number, because the mean of its divisors is an integer number (1753507).

Almost surely, 2^10020020 is an apocalyptic number.

10020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10020020 is an abundant number, since it is smaller than the sum of its proper divisors (11022064).

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

10020020 is a wasteful number, since it uses less digits than its factorization.

10020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501010 (or 501008 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 10020020 is about 3165.4415173874. The cubic root of 10020020 is about 215.5871457738.

Adding to 10020020 its reverse (2002001), we get a palindrome (12022021).

The spelling of 10020020 in words is "ten million, twenty thousand, twenty".