18227512944 has 100 divisors (see below), whose sum is σ = 53543364424. Its totient is φ = 5985124992.

The previous prime is 18227512921. The next prime is 18227512973. The reversal of 18227512944 is 44921572281.

It is a self number, because there is not a number n which added to its sum of digits gives 18227512944.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18127 + ... + 191790.

Almost surely, 2^18227512944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18227512944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26771682212).

18227512944 is an abundant number, since it is smaller than the sum of its proper divisors (35315851480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18227512944 is a wasteful number, since it uses less digits than its factorization.

18227512944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210004 (or 209989 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The spelling of 18227512944 in words is "eighteen billion, two hundred twenty-seven million, five hundred twelve thousand, nine hundred forty-four".