18530744 has 8 divisors (see below), whose sum is σ = 34745160. Its totient is φ = 9265368.

The previous prime is 18530741. The next prime is 18530749. The reversal of 18530744 is 44703581.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 18530744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18530741) 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 as a sum of consecutive naturals, namely, 1158164 + ... + 1158179.

It is an arithmetic number, because the mean of its divisors is an integer number (4343145).

Almost surely, 2^18530744 is an apocalyptic number.

It is an amenable number.

18530744 is a deficient number, since it is larger than the sum of its proper divisors (16214416).

18530744 is a wasteful number, since it uses less digits than its factorization.

18530744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316349 (or 2316345 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 18530744 is about 4304.7350673415. The cubic root of 18530744 is about 264.6250494140.

The spelling of 18530744 in words is "eighteen million, five hundred thirty thousand, seven hundred forty-four".