20004444020 has 96 divisors (see below), whose sum is σ = 46768409856. Its totient is φ = 7125580800.

The previous prime is 20004444011. The next prime is 20004444049. The reversal of 20004444020 is 2044440002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20004443983 and 20004444001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10924505 + ... + 10926335.

It is an arithmetic number, because the mean of its divisors is an integer number (487170936).

Almost surely, 2^20004444020 is an apocalyptic number.

20004444020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20004444020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23384204928).

20004444020 is an abundant number, since it is smaller than the sum of its proper divisors (26763965836).

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

20004444020 is a wasteful number, since it uses less digits than its factorization.

20004444020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841 (or 2839 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20004444020 its reverse (2044440002), we get a palindrome (22048884022).

The spelling of 20004444020 in words is "twenty billion, four million, four hundred forty-four thousand, twenty".