18224742 has 16 divisors (see below), whose sum is σ = 36949680. Its totient is φ = 5991552.

The previous prime is 18224741. The next prime is 18224761. The reversal of 18224742 is 24742281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18224741) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20367 + ... + 21242.

It is an arithmetic number, because the mean of its divisors is an integer number (2309355).

Almost surely, 2^18224742 is an apocalyptic number.

18224742 is an abundant number, since it is smaller than the sum of its proper divisors (18724938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18224742 is a wasteful number, since it uses less digits than its factorization.

18224742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41687.

The product of its digits is 7168, while the sum is 30.

The square root of 18224742 is about 4269.0446238005. The cubic root of 18224742 is about 263.1603546282.

The spelling of 18224742 in words is "eighteen million, two hundred twenty-four thousand, seven hundred forty-two".