18528730057 has 16 divisors (see below), whose sum is σ = 19916899200. Its totient is φ = 17194649472.

The previous prime is 18528730043. The next prime is 18528730069. The reversal of 18528730057 is 75003782581.

It is a cyclic number.

It is not a de Polignac number, because 18528730057 - 2⁷ = 18528729929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18528729989 and 18528730016.

It is not an unprimeable number, because it can be changed into a prime (18528730027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84493 + ... + 210229.

It is an arithmetic number, because the mean of its divisors is an integer number (1244806200).

Almost surely, 2^18528730057 is an apocalyptic number.

It is an amenable number.

18528730057 is a deficient number, since it is larger than the sum of its proper divisors (1388169143).

18528730057 is a wasteful number, since it uses less digits than its factorization.

18528730057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125952.

The product of its (nonzero) digits is 470400, while the sum is 46.

The spelling of 18528730057 in words is "eighteen billion, five hundred twenty-eight million, seven hundred thirty thousand, fifty-seven".