18749814 has 16 divisors (see below), whose sum is σ = 38115120. Its totient is φ = 6147360.

The previous prime is 18749803. The next prime is 18749867. The reversal of 18749814 is 41894781.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25249 + ... + 25980.

It is an arithmetic number, because the mean of its divisors is an integer number (2382195).

Almost surely, 2^18749814 is an apocalyptic number.

18749814 is an abundant number, since it is smaller than the sum of its proper divisors (19365306).

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

18749814 is a wasteful number, since it uses less digits than its factorization.

18749814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51295.

The product of its digits is 64512, while the sum is 42.

The square root of 18749814 is about 4330.1055414389. The cubic root of 18749814 is about 265.6637638283.

The spelling of 18749814 in words is "eighteen million, seven hundred forty-nine thousand, eight hundred fourteen".