16520205042 has 64 divisors (see below), whose sum is σ = 40101004800. Its totient is φ = 4999620240.

The previous prime is 16520205041. The next prime is 16520205077. The reversal of 16520205042 is 24050202561.

16520205042 is a `hidden beast` number, since 1 + 652 + 0 + 2 + 0 + 5 + 0 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 16520204997 and 16520205015.

It is not an unprimeable number, because it can be changed into a prime (16520205041) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 449809 + ... + 485147.

It is an arithmetic number, because the mean of its divisors is an integer number (626578200).

Almost surely, 2^16520205042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16520205042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20050502400).

16520205042 is an abundant number, since it is smaller than the sum of its proper divisors (23580799758).

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

16520205042 is a wasteful number, since it uses less digits than its factorization.

16520205042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36148 (or 36142 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 16520205042 in words is "sixteen billion, five hundred twenty million, two hundred five thousand, forty-two".