18605227225 has 48 divisors (see below), whose sum is σ = 25352932864. Its totient is φ = 13460256000.

The previous prime is 18605227187. The next prime is 18605227283. The reversal of 18605227225 is 52272250681.

It is a de Polignac number, because none of the positive numbers 2^k-18605227225 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 5370844 + ... + 5374306.

Almost surely, 2^18605227225 is an apocalyptic number.

It is an amenable number.

18605227225 is a deficient number, since it is larger than the sum of its proper divisors (6747705639).

18605227225 is a wasteful number, since it uses less digits than its factorization.

18605227225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818 (or 3813 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 18605227225 in words is "eighteen billion, six hundred five million, two hundred twenty-seven thousand, two hundred twenty-five".