18887091842 has 8 divisors (see below), whose sum is σ = 28989489936. Its totient is φ = 9223928532.

The previous prime is 18887091823. The next prime is 18887091869. The reversal of 18887091842 is 24819078881.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109808588 + ... + 109808759.

It is an arithmetic number, because the mean of its divisors is an integer number (3623686242).

Almost surely, 2^18887091842 is an apocalyptic number.

18887091842 is a deficient number, since it is larger than the sum of its proper divisors (10102398094).

18887091842 is a wasteful number, since it uses less digits than its factorization.

18887091842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219617392.

The product of its (nonzero) digits is 2064384, while the sum is 56.

The spelling of 18887091842 in words is "eighteen billion, eight hundred eighty-seven million, ninety-one thousand, eight hundred forty-two".