18384742 has 8 divisors (see below), whose sum is σ = 29028600. Its totient is φ = 8708544.

The previous prime is 18384739. The next prime is 18384757. The reversal of 18384742 is 24748381.

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

It is a congruent number.

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, 241867 + ... + 241942.

It is an arithmetic number, because the mean of its divisors is an integer number (3628575).

Almost surely, 2^18384742 is an apocalyptic number.

18384742 is a deficient number, since it is larger than the sum of its proper divisors (10643858).

18384742 is a wasteful number, since it uses less digits than its factorization.

18384742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483830.

The product of its digits is 43008, while the sum is 37.

The square root of 18384742 is about 4287.7432292524. The cubic root of 18384742 is about 263.9282307972.

The spelling of 18384742 in words is "eighteen million, three hundred eighty-four thousand, seven hundred forty-two".