18049784 has 48 divisors (see below), whose sum is σ = 37097880. Its totient is φ = 8225280.

The previous prime is 18049783. The next prime is 18049789. The reversal of 18049784 is 48794081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18049783) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 85439 + ... + 85649.

Almost surely, 2^18049784 is an apocalyptic number.

It is an amenable number.

18049784 is an abundant number, since it is smaller than the sum of its proper divisors (19048096).

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

18049784 is a wasteful number, since it uses less digits than its factorization.

18049784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 18049784 is about 4248.5037366113. The cubic root of 18049784 is about 262.3155299569.

The spelling of 18049784 in words is "eighteen million, forty-nine thousand, seven hundred eighty-four".