18748068639 has 8 divisors (see below), whose sum is σ = 26467861680. Its totient is φ = 11763494016.

The previous prime is 18748068623. The next prime is 18748068643. The reversal of 18748068639 is 93686084781.

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

It is not a de Polignac number, because 18748068639 - 2⁴ = 18748068623 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18748068649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183804544 + ... + 183804645.

It is an arithmetic number, because the mean of its divisors is an integer number (3308482710).

Almost surely, 2^18748068639 is an apocalyptic number.

18748068639 is a deficient number, since it is larger than the sum of its proper divisors (7719793041).

18748068639 is a wasteful number, since it uses less digits than its factorization.

18748068639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367609209.

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 18748068639 in words is "eighteen billion, seven hundred forty-eight million, sixty-eight thousand, six hundred thirty-nine".