18741388 has 12 divisors (see below), whose sum is σ = 33684112. Its totient is φ = 9117360.

The previous prime is 18741377. The next prime is 18741397. The reversal of 18741388 is 88314781.

It is a self number, because there is not a number n which added to its sum of digits gives 18741388.

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 3 ways as a sum of consecutive naturals, for example, 63168 + ... + 63463.

Almost surely, 2^18741388 is an apocalyptic number.

It is an amenable number.

18741388 is a deficient number, since it is larger than the sum of its proper divisors (14942724).

18741388 is a wasteful number, since it uses less digits than its factorization.

18741388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126672 (or 126670 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 18741388 is about 4329.1324766054. The cubic root of 18741388 is about 265.6239622197.

The spelling of 18741388 in words is "eighteen million, seven hundred forty-one thousand, three hundred eighty-eight".