18199742 has 16 divisors (see below), whose sum is σ = 30143232. Its totient is φ = 8172120.

The previous prime is 18199729. The next prime is 18199747. The reversal of 18199742 is 24799181.

It is a self number, because there is not a number n which added to its sum of digits gives 18199742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18199747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3158 + ... + 6809.

It is an arithmetic number, because the mean of its divisors is an integer number (1883952).

Almost surely, 2^18199742 is an apocalyptic number.

18199742 is a deficient number, since it is larger than the sum of its proper divisors (11943490).

18199742 is a wasteful number, since it uses less digits than its factorization.

18199742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10063.

The product of its digits is 36288, while the sum is 41.

The square root of 18199742 is about 4266.1155633667. The cubic root of 18199742 is about 263.0399684807.

The spelling of 18199742 in words is "eighteen million, one hundred ninety-nine thousand, seven hundred forty-two".