18528157 has 8 divisors (see below), whose sum is σ = 19183616. Its totient is φ = 17880912.

The previous prime is 18528143. The next prime is 18528163. The reversal of 18528157 is 75182581.

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-18528157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18528137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2728 + ... + 6670.

It is an arithmetic number, because the mean of its divisors is an integer number (2397952).

Almost surely, 2^18528157 is an apocalyptic number.

It is an amenable number.

18528157 is a deficient number, since it is larger than the sum of its proper divisors (655459).

18528157 is a wasteful number, since it uses less digits than its factorization.

18528157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107.

The product of its digits is 22400, while the sum is 37.

The square root of 18528157 is about 4304.4345737855. The cubic root of 18528157 is about 264.6127344405.

The spelling of 18528157 in words is "eighteen million, five hundred twenty-eight thousand, one hundred fifty-seven".