18667446842 has 8 divisors (see below), whose sum is σ = 30546731232. Its totient is φ = 8485203100.

The previous prime is 18667446817. The next prime is 18667446871. The reversal of 18667446842 is 24864476681.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424260134 + ... + 424260177.

It is an arithmetic number, because the mean of its divisors is an integer number (3818341404).

Almost surely, 2^18667446842 is an apocalyptic number.

18667446842 is a deficient number, since it is larger than the sum of its proper divisors (11879284390).

18667446842 is a wasteful number, since it uses less digits than its factorization.

18667446842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848520324.

The product of its digits is 12386304, while the sum is 56.

The spelling of 18667446842 in words is "eighteen billion, six hundred sixty-seven million, four hundred forty-six thousand, eight hundred forty-two".