20005000000 has 112 divisors (see below), whose sum is σ = 49634052624. Its totient is φ = 8000000000.

The previous prime is 20004999997. The next prime is 20005000013. The reversal of 20005000000 is 50002.

It can be written as a sum of positive squares in 8 ways, for example, as 9939292416 + 10065707584 = 99696^2 + 100328^2 .

It is a sliding number, since 20005000000 = 5000000 + 20000000000 and 1/5000000 + 1/20000000000 = 0.00000020005000000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4998000 + ... + 5002000.

Almost surely, 2^20005000000 is an apocalyptic number.

20005000000 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 20005000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24817026312).

20005000000 is an abundant number, since it is smaller than the sum of its proper divisors (29629052624).

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

20005000000 is an frugal number, since it uses more digits than its factorization.

20005000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048 (or 4008 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 7.

Adding to 20005000000 its reverse (50002), we get a palindrome (20005050002).

It can be divided in two parts, 2000 and 5000000, that multiplied together give a 10-th power (10000000000 = 10¹⁰).

The spelling of 20005000000 in words is "twenty billion, five million", and thus it is an aban number and an uban number.