18891396322 has 8 divisors (see below), whose sum is σ = 28817384400. Its totient is φ = 9285601524.

The previous prime is 18891396317. The next prime is 18891396347. The reversal of 18891396322 is 22369319881.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18891396322.

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, 80048172 + ... + 80048407.

It is an arithmetic number, because the mean of its divisors is an integer number (3602173050).

Almost surely, 2^18891396322 is an apocalyptic number.

18891396322 is a deficient number, since it is larger than the sum of its proper divisors (9925988078).

18891396322 is a wasteful number, since it uses less digits than its factorization.

18891396322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160096640.

The product of its digits is 1119744, while the sum is 52.

The spelling of 18891396322 in words is "eighteen billion, eight hundred ninety-one million, three hundred ninety-six thousand, three hundred twenty-two".