18022827 has 4 divisors (see below), whose sum is σ = 24030440. Its totient is φ = 12015216.

The previous prime is 18022819. The next prime is 18022843. The reversal of 18022827 is 72822081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72822081 = 3 ⋅24274027.

It is not a de Polignac number, because 18022827 - 2³ = 18022819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18022794 and 18022803.

It is not an unprimeable number, because it can be changed into a prime (18022817) 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, 3003802 + ... + 3003807.

It is an arithmetic number, because the mean of its divisors is an integer number (6007610).

Almost surely, 2^18022827 is an apocalyptic number.

18022827 is a deficient number, since it is larger than the sum of its proper divisors (6007613).

18022827 is an equidigital number, since it uses as much as digits as its factorization.

18022827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6007612.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 18022827 is about 4245.3300225071. The cubic root of 18022827 is about 262.1848771854.

The spelling of 18022827 in words is "eighteen million, twenty-two thousand, eight hundred twenty-seven".