16020056520 has 192 divisors, whose sum is σ = 56149919280. Its totient is φ = 3937794048.

The previous prime is 16020056513. The next prime is 16020056543. The reversal of 16020056520 is 2565002061.

16020056520 is a `hidden beast` number, since 1 + 6 + 0 + 2 + 0 + 0 + 5 + 652 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2830452804 + 13189603716 = 53202^2 + 114846^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3990034 + ... + 3994046.

Almost surely, 2^16020056520 is an apocalyptic number.

16020056520 is a gapful number since it is divisible by the number (10) 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 16020056520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28074959640).

16020056520 is an abundant number, since it is smaller than the sum of its proper divisors (40129862760).

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

16020056520 is a wasteful number, since it uses less digits than its factorization.

16020056520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896 (or 4889 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 16020056520 its reverse (2565002061), we get a palindrome (18585058581).

The spelling of 16020056520 in words is "sixteen billion, twenty million, fifty-six thousand, five hundred twenty".