16820507057 has 8 divisors (see below), whose sum is σ = 16844653632. Its totient is φ = 16796379600.

The previous prime is 16820507023. The next prime is 16820507101. The reversal of 16820507057 is 75070502861.

16820507057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16820507057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16820501057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2797148 + ... + 2803154.

It is an arithmetic number, because the mean of its divisors is an integer number (2105581704).

Almost surely, 2^16820507057 is an apocalyptic number.

It is an amenable number.

16820507057 is a deficient number, since it is larger than the sum of its proper divisors (24146575).

16820507057 is a wasteful number, since it uses less digits than its factorization.

16820507057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9559.

The product of its (nonzero) digits is 117600, while the sum is 41.

The spelling of 16820507057 in words is "sixteen billion, eight hundred twenty million, five hundred seven thousand, fifty-seven".