20020003020 has 72 divisors (see below), whose sum is σ = 60862838400. Its totient is φ = 5326755840.

The previous prime is 20020002997. The next prime is 20020003021. The reversal of 20020003020 is 2030002002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20020002993 and 20020003011.

It is not an unprimeable number, because it can be changed into a prime (20020003021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43036 + ... + 204675.

It is an arithmetic number, because the mean of its divisors is an integer number (845317200).

Almost surely, 2^20020003020 is an apocalyptic number.

20020003020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020003020 is an abundant number, since it is smaller than the sum of its proper divisors (40842835380).

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

20020003020 is a wasteful number, since it uses less digits than its factorization.

20020003020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248175 (or 248170 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

Adding to 20020003020 its reverse (2030002002), we get a palindrome (22050005022).

The spelling of 20020003020 in words is "twenty billion, twenty million, three thousand, twenty".