18022127 has 4 divisors (see below), whose sum is σ = 18970680. Its totient is φ = 17073576.

The previous prime is 18022111. The next prime is 18022141. The reversal of 18022127 is 72122081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72122081 = 19 ⋅3795899.

It is a cyclic number.

It is not a de Polignac number, because 18022127 - 2⁴ = 18022111 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 (18022157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474248 + ... + 474285.

It is an arithmetic number, because the mean of its divisors is an integer number (4742670).

Almost surely, 2^18022127 is an apocalyptic number.

18022127 is a deficient number, since it is larger than the sum of its proper divisors (948553).

18022127 is an equidigital number, since it uses as much as digits as its factorization.

18022127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948552.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 18022127 is about 4245.2475781749. The cubic root of 18022127 is about 262.1814827532.

The spelling of 18022127 in words is "eighteen million, twenty-two thousand, one hundred twenty-seven".