20204500520 has 64 divisors (see below), whose sum is σ = 46240500240. Its totient is φ = 7943270400.

The previous prime is 20204500507. The next prime is 20204500549. The reversal of 20204500520 is 2500540202.

It can be written as a sum of positive squares in 8 ways, for example, as 1565151844 + 18639348676 = 39562^2 + 136526^2 .

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 = 20204500492 and 20204500501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4567910 + ... + 4572330.

Almost surely, 2^20204500520 is an apocalyptic number.

20204500520 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 20204500520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23120250120).

20204500520 is an abundant number, since it is smaller than the sum of its proper divisors (26035999720).

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

20204500520 is a wasteful number, since it uses less digits than its factorization.

20204500520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6366 (or 6362 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The spelling of 20204500520 in words is "twenty billion, two hundred four million, five hundred thousand, five hundred twenty".