18748642 has 8 divisors (see below), whose sum is σ = 30679632. Its totient is φ = 8522100.

The previous prime is 18748627. The next prime is 18748643. The reversal of 18748642 is 24684781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18748595 and 18748604.

It is not an unprimeable number, because it can be changed into a prime (18748643) 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 in 3 ways as a sum of consecutive naturals, for example, 426084 + ... + 426127.

It is an arithmetic number, because the mean of its divisors is an integer number (3834954).

Almost surely, 2^18748642 is an apocalyptic number.

18748642 is a deficient number, since it is larger than the sum of its proper divisors (11930990).

18748642 is a wasteful number, since it uses less digits than its factorization.

18748642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852224.

The product of its digits is 86016, while the sum is 40.

The square root of 18748642 is about 4329.9702077497. The cubic root of 18748642 is about 265.6582284060.

The spelling of 18748642 in words is "eighteen million, seven hundred forty-eight thousand, six hundred forty-two".