18305942 has 8 divisors (see below), whose sum is σ = 27498576. Its totient is φ = 9139752.

The previous prime is 18305939. The next prime is 18305971. The reversal of 18305942 is 24950381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18305899 and 18305908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4778 + ... + 7709.

It is an arithmetic number, because the mean of its divisors is an integer number (3437322).

Almost surely, 2^18305942 is an apocalyptic number.

18305942 is a deficient number, since it is larger than the sum of its proper divisors (9192634).

18305942 is a wasteful number, since it uses less digits than its factorization.

18305942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13222.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18305942 is about 4278.5443786409. The cubic root of 18305942 is about 263.5506109674.

The spelling of 18305942 in words is "eighteen million, three hundred five thousand, nine hundred forty-two".