18306423 has 6 divisors (see below), whose sum is σ = 26442624. Its totient is φ = 12204276.

The previous prime is 18306419. The next prime is 18306451. The reversal of 18306423 is 32460381.

It is a happy number.

18306423 is a `hidden beast` number, since 18 + 3 + 0 + 642 + 3 = 666.

It is not a de Polignac number, because 18306423 - 2² = 18306419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18306403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1017015 + ... + 1017032.

It is an arithmetic number, because the mean of its divisors is an integer number (4407104).

Almost surely, 2^18306423 is an apocalyptic number.

18306423 is a deficient number, since it is larger than the sum of its proper divisors (8136201).

18306423 is a wasteful number, since it uses less digits than its factorization.

18306423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034053 (or 2034050 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 18306423 is about 4278.6005889777. The cubic root of 18306423 is about 263.5529192659.

The spelling of 18306423 in words is "eighteen million, three hundred six thousand, four hundred twenty-three".