18528436 has 12 divisors (see below), whose sum is σ = 34332228. Its totient is φ = 8719232.

The previous prime is 18528431. The next prime is 18528449. The reversal of 18528436 is 63482581.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15444900 + 3083536 = 3930^2 + 1756^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18528395 and 18528404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18528431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136171 + ... + 136306.

It is an arithmetic number, because the mean of its divisors is an integer number (2861019).

Almost surely, 2^18528436 is an apocalyptic number.

It is an amenable number.

18528436 is a deficient number, since it is larger than the sum of its proper divisors (15803792).

18528436 is a wasteful number, since it uses less digits than its factorization.

18528436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272498 (or 272496 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 18528436 is about 4304.4669821013. The cubic root of 18528436 is about 264.6140626277.

The spelling of 18528436 in words is "eighteen million, five hundred twenty-eight thousand, four hundred thirty-six".