18173842 has 8 divisors (see below), whose sum is σ = 28695600. Its totient is φ = 8608644.

The previous prime is 18173809. The next prime is 18173873. The reversal of 18173842 is 24837181.

It is a happy number.

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 = 18173798 and 18173807.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239092 + ... + 239167.

It is an arithmetic number, because the mean of its divisors is an integer number (3586950).

Almost surely, 2^18173842 is an apocalyptic number.

18173842 is a deficient number, since it is larger than the sum of its proper divisors (10521758).

18173842 is a wasteful number, since it uses less digits than its factorization.

18173842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478280.

The product of its digits is 10752, while the sum is 34.

The square root of 18173842 is about 4263.0789342915. The cubic root of 18173842 is about 262.9151321054.

The spelling of 18173842 in words is "eighteen million, one hundred seventy-three thousand, eight hundred forty-two".