18227673894544 has 15 divisors (see below), whose sum is σ = 35316151258467. Its totient is φ = 9113828408496.

The previous prime is 18227673894523. The next prime is 18227673894553. The reversal of 18227673894544 is 44549837672281.

The square root of 18227673894544 is 4269388.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16543879 + ... + 17611225.

Almost surely, 2^{18227673894544} is an apocalyptic number.

18227673894544 is the 4269388-th square number.

It is an amenable number.

18227673894544 is a deficient number, since it is larger than the sum of its proper divisors (17088477363923).

18227673894544 is an frugal number, since it uses more digits than its factorization.

18227673894544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134702 (or 1067349 counting only the distinct ones).

The product of its digits is 650280960, while the sum is 70.

The spelling of 18227673894544 in words is "eighteen trillion, two hundred twenty-seven billion, six hundred seventy-three million, eight hundred ninety-four thousand, five hundred forty-four".