18528061 has 4 divisors (see below), whose sum is σ = 18581500. Its totient is φ = 18474624.

The previous prime is 18528043. The next prime is 18528073. The reversal of 18528061 is 16082581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6728836 + 11799225 = 2594^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 18528061 - 2⁷ = 18527933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18528031) 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, 26196 + ... + 26893.

It is an arithmetic number, because the mean of its divisors is an integer number (4645375).

Almost surely, 2^18528061 is an apocalyptic number.

It is an amenable number.

18528061 is a deficient number, since it is larger than the sum of its proper divisors (53439).

18528061 is an equidigital number, since it uses as much as digits as its factorization.

18528061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53438.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 18528061 is about 4304.4234224806. The cubic root of 18528061 is about 264.6122774268.

The spelling of 18528061 in words is "eighteen million, five hundred twenty-eight thousand, sixty-one".