20031110020 has 24 divisors (see below), whose sum is σ = 42347655000. Its totient is φ = 7958668032.

The previous prime is 20031109961. The next prime is 20031110023. The reversal of 20031110020 is 2001113002.

It can be written as a sum of positive squares in 4 ways, for example, as 89151364 + 19941958656 = 9442^2 + 141216^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20031109979 and 20031110006.

It is not an unprimeable number, because it can be changed into a prime (20031110023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3357945 + ... + 3363904.

It is an arithmetic number, because the mean of its divisors is an integer number (1764485625).

Almost surely, 2^20031110020 is an apocalyptic number.

20031110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031110020 is an abundant number, since it is smaller than the sum of its proper divisors (22316544980).

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

20031110020 is a wasteful number, since it uses less digits than its factorization.

20031110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6722007 (or 6722005 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20031110020 its reverse (2001113002), we get a palindrome (22032223022).

The spelling of 20031110020 in words is "twenty billion, thirty-one million, one hundred ten thousand, twenty".