18886367842 has 8 divisors (see below), whose sum is σ = 28371399516. Its totient is φ = 9429234672.

The previous prime is 18886367779. The next prime is 18886367861. The reversal of 18886367842 is 24876368881.

It can be written as a sum of positive squares in 2 ways, for example, as 14866681041 + 4019686801 = 121929^2 + 63401^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6972933 + ... + 6975640.

Almost surely, 2^18886367842 is an apocalyptic number.

18886367842 is a deficient number, since it is larger than the sum of its proper divisors (9485031674).

18886367842 is a wasteful number, since it uses less digits than its factorization.

18886367842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13949252.

The product of its digits is 24772608, while the sum is 61.

The spelling of 18886367842 in words is "eighteen billion, eight hundred eighty-six million, three hundred sixty-seven thousand, eight hundred forty-two".