18228215786 has 16 divisors (see below), whose sum is σ = 29922095520. Its totient is φ = 8259412080.

The previous prime is 18228215773. The next prime is 18228215827. The reversal of 18228215786 is 68751282281.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299896 + ... + 1313843.

It is an arithmetic number, because the mean of its divisors is an integer number (1870130970).

Almost surely, 2^18228215786 is an apocalyptic number.

18228215786 is a deficient number, since it is larger than the sum of its proper divisors (11693879734).

18228215786 is a wasteful number, since it uses less digits than its factorization.

18228215786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614069.

The product of its digits is 860160, while the sum is 50.

The spelling of 18228215786 in words is "eighteen billion, two hundred twenty-eight million, two hundred fifteen thousand, seven hundred eighty-six".