20044020520 has 16 divisors (see below), whose sum is σ = 45099046260. Its totient is φ = 8017608192.

The previous prime is 20044020497. The next prime is 20044020553. The reversal of 20044020520 is 2502044002.

It can be written as a sum of positive squares in 2 ways, for example, as 20009234116 + 34786404 = 141454^2 + 5898^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250550217 + ... + 250550296.

Almost surely, 2^20044020520 is an apocalyptic number.

20044020520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20044020520 is an abundant number, since it is smaller than the sum of its proper divisors (25055025740).

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

20044020520 is a wasteful number, since it uses less digits than its factorization.

20044020520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501100524 (or 501100520 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

Adding to 20044020520 its reverse (2502044002), we get a palindrome (22546064522).

The spelling of 20044020520 in words is "twenty billion, forty-four million, twenty thousand, five hundred twenty".