18006422 has 24 divisors (see below), whose sum is σ = 32157576. Its totient is φ = 7535808.

The previous prime is 18006413. The next prime is 18006431. The reversal of 18006422 is 22460081.

It is an interprime number because it is at equal distance from previous prime (18006413) and next prime (18006431).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2078 + ... + 6350.

It is an arithmetic number, because the mean of its divisors is an integer number (1339899).

Almost surely, 2^18006422 is an apocalyptic number.

18006422 is a deficient number, since it is larger than the sum of its proper divisors (14151154).

18006422 is a wasteful number, since it uses less digits than its factorization.

18006422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332 (or 4325 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 18006422 is about 4243.3974595835. The cubic root of 18006422 is about 262.1053031247.

The spelling of 18006422 in words is "eighteen million, six thousand, four hundred twenty-two".