18286427 has 4 divisors (see below), whose sum is σ = 18537000. Its totient is φ = 18035856.

The previous prime is 18286393. The next prime is 18286483. The reversal of 18286427 is 72468281.

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

It is a cyclic number.

It is not a de Polignac number, because 18286427 - 2¹⁰ = 18285403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18286727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125177 + ... + 125322.

It is an arithmetic number, because the mean of its divisors is an integer number (4634250).

Almost surely, 2^18286427 is an apocalyptic number.

18286427 is a deficient number, since it is larger than the sum of its proper divisors (250573).

18286427 is an equidigital number, since it uses as much as digits as its factorization.

18286427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250572.

The product of its digits is 43008, while the sum is 38.

The square root of 18286427 is about 4276.2632051828. The cubic root of 18286427 is about 263.4569251962.

The spelling of 18286427 in words is "eighteen million, two hundred eighty-six thousand, four hundred twenty-seven".