18354938 has 8 divisors (see below), whose sum is σ = 31465632. Its totient is φ = 7866396.

The previous prime is 18354913. The next prime is 18354949. The reversal of 18354938 is 83945381.

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 = 18354895 and 18354904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655520 + ... + 655547.

It is an arithmetic number, because the mean of its divisors is an integer number (3933204).

Almost surely, 2^18354938 is an apocalyptic number.

18354938 is a deficient number, since it is larger than the sum of its proper divisors (13110694).

18354938 is a wasteful number, since it uses less digits than its factorization.

18354938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311076.

The product of its digits is 103680, while the sum is 41.

The square root of 18354938 is about 4284.2663315905. The cubic root of 18354938 is about 263.7855332733.

The spelling of 18354938 in words is "eighteen million, three hundred fifty-four thousand, nine hundred thirty-eight".