20030020 has 12 divisors (see below), whose sum is σ = 42063084. Its totient is φ = 8012000.

The previous prime is 20030011. The next prime is 20030027. The reversal of 20030020 is 2003002.

It can be written as a sum of positive squares in 2 ways, for example, as 4726276 + 15303744 = 2174^2 + 3912^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20029985 and 20030012.

It is not an unprimeable number, because it can be changed into a prime (20030027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500731 + ... + 500770.

It is an arithmetic number, because the mean of its divisors is an integer number (3505257).

Almost surely, 2^20030020 is an apocalyptic number.

20030020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20030020 is an abundant number, since it is smaller than the sum of its proper divisors (22033064).

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

20030020 is a wasteful number, since it uses less digits than its factorization.

20030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001510 (or 1001508 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 20030020 is about 4475.4910345123. The cubic root of 20030020 is about 271.5775051266.

Adding to 20030020 its reverse (2003002), we get a palindrome (22033022).

The spelling of 20030020 in words is "twenty million, thirty thousand, twenty".