18450647244 has 36 divisors (see below), whose sum is σ = 46681984440. Its totient is φ = 6144565440.

The previous prime is 18450647233. The next prime is 18450647251. The reversal of 18450647244 is 44274605481.

18450647244 is a `hidden beast` number, since 1 + 84 + 506 + 47 + 24 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18450647244.

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 11 ways as a sum of consecutive naturals, for example, 195609 + ... + 274160.

It is an arithmetic number, because the mean of its divisors is an integer number (1296721790).

Almost surely, 2^18450647244 is an apocalyptic number.

It is an amenable number.

18450647244 is an abundant number, since it is smaller than the sum of its proper divisors (28231337196).

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

18450647244 is a wasteful number, since it uses less digits than its factorization.

18450647244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470870 (or 470865 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 45.

The spelling of 18450647244 in words is "eighteen billion, four hundred fifty million, six hundred forty-seven thousand, two hundred forty-four".