18225346388 has 6 divisors (see below), whose sum is σ = 31894356186. Its totient is φ = 9112673192.

The previous prime is 18225346319. The next prime is 18225346423. The reversal of 18225346388 is 88364352281.

It can be written as a sum of positive squares in only one way, i.e., 14588291524 + 3637054864 = 120782^2 + 60308^2 .

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 as a sum of consecutive naturals, namely, 2278168295 + ... + 2278168302.

It is an arithmetic number, because the mean of its divisors is an integer number (5315726031).

Almost surely, 2^18225346388 is an apocalyptic number.

It is an amenable number.

18225346388 is a deficient number, since it is larger than the sum of its proper divisors (13669009798).

18225346388 is a wasteful number, since it uses less digits than its factorization.

18225346388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556336601 (or 4556336599 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 50.

The spelling of 18225346388 in words is "eighteen billion, two hundred twenty-five million, three hundred forty-six thousand, three hundred eighty-eight".