18306422 has 16 divisors (see below), whose sum is σ = 27941760. Its totient is φ = 8994048.

The previous prime is 18306419. The next prime is 18306451. The reversal of 18306422 is 22460381.

It is a junction number, because it is equal to n+sod(n) for n = 18306391 and 18306400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37979 + ... + 38457.

It is an arithmetic number, because the mean of its divisors is an integer number (1746360).

Almost surely, 2^18306422 is an apocalyptic number.

18306422 is a deficient number, since it is larger than the sum of its proper divisors (9635338).

18306422 is a wasteful number, since it uses less digits than its factorization.

18306422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 18306422 is about 4278.6004721170. The cubic root of 18306422 is about 263.5529144670.

The spelling of 18306422 in words is "eighteen million, three hundred six thousand, four hundred twenty-two".