20031000020 has 24 divisors (see below), whose sum is σ = 42103702368. Its totient is φ = 8005047200.

The previous prime is 20031000019. The next prime is 20031000029. The reversal of 20031000020 is 2000013002.

It is a junction number, because it is equal to n+sod(n) for n = 20030999971 and 20031000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031000029) 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, 437186 + ... + 480825.

It is an arithmetic number, because the mean of its divisors is an integer number (1754320932).

Almost surely, 2^20031000020 is an apocalyptic number.

20031000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031000020 is an abundant number, since it is smaller than the sum of its proper divisors (22072702348).

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

20031000020 is a wasteful number, since it uses less digits than its factorization.

20031000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919111 (or 919109 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

Adding to 20031000020 its reverse (2000013002), we get a palindrome (22031013022).

The spelling of 20031000020 in words is "twenty billion, thirty-one million, twenty", and thus it is an aban number and an uban number.