18645773448 has 32 divisors (see below), whose sum is σ = 47606232960. Its totient is φ = 6083017920.

The previous prime is 18645773413. The next prime is 18645773513. The reversal of 18645773448 is 84437754681.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 8263843 + ... + 8266098.

It is an arithmetic number, because the mean of its divisors is an integer number (1487694780).

Almost surely, 2^18645773448 is an apocalyptic number.

It is an amenable number.

18645773448 is an abundant number, since it is smaller than the sum of its proper divisors (28960459512).

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

18645773448 is a wasteful number, since it uses less digits than its factorization.

18645773448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16529997 (or 16529993 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 57.

The spelling of 18645773448 in words is "eighteen billion, six hundred forty-five million, seven hundred seventy-three thousand, four hundred forty-eight".