18445167898 has 8 divisors (see below), whose sum is σ = 27678487680. Its totient is φ = 9219005340.

The previous prime is 18445167889. The next prime is 18445167901. The reversal of 18445167898 is 89876154481.

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, 1782858 + ... + 1793173.

It is an arithmetic number, because the mean of its divisors is an integer number (3459810960).

Almost surely, 2^18445167898 is an apocalyptic number.

18445167898 is a deficient number, since it is larger than the sum of its proper divisors (9233319782).

18445167898 is a wasteful number, since it uses less digits than its factorization.

18445167898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578612.

The product of its digits is 15482880, while the sum is 61.

The spelling of 18445167898 in words is "eighteen billion, four hundred forty-five million, one hundred sixty-seven thousand, eight hundred ninety-eight".