18057827 has 4 divisors (see below), whose sum is σ = 18157776. Its totient is φ = 17957880.

The previous prime is 18057817. The next prime is 18057839. The reversal of 18057827 is 72875081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72875081 = 41 ⋅1777441.

It is a cyclic number.

It is not a de Polignac number, because 18057827 - 2⁶ = 18057763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18057817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49703 + ... + 50064.

It is an arithmetic number, because the mean of its divisors is an integer number (4539444).

Almost surely, 2^18057827 is an apocalyptic number.

18057827 is a deficient number, since it is larger than the sum of its proper divisors (99949).

18057827 is an equidigital number, since it uses as much as digits as its factorization.

18057827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99948.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 18057827 is about 4249.4501997317. The cubic root of 18057827 is about 262.3544868499.

The spelling of 18057827 in words is "eighteen million, fifty-seven thousand, eight hundred twenty-seven".