20002000020 has 48 divisors (see below), whose sum is σ = 56013128640. Its totient is φ = 5333149696.

The previous prime is 20001999977. The next prime is 20002000021. The reversal of 20002000020 is 2000020002.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 20001999972 and 20002000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002000021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547444 + ... + 582836.

It is an arithmetic number, because the mean of its divisors is an integer number (1166940180).

Almost surely, 2^20002000020 is an apocalyptic number.

20002000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002000020 is an abundant number, since it is smaller than the sum of its proper divisors (36011128620).

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

20002000020 is a wasteful number, since it uses less digits than its factorization.

20002000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44824 (or 44822 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 6.

Adding to 20002000020 its reverse (2000020002), we get a palindrome (22002020022).

The spelling of 20002000020 in words is "twenty billion, two million, twenty", and thus it is an aban number and an uban number.