18493503448 has 32 divisors (see below), whose sum is σ = 41960052000. Its totient is φ = 7459564032.

The previous prime is 18493503403. The next prime is 18493503451. The reversal of 18493503448 is 84430539481.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9712023 + ... + 9713926.

It is an arithmetic number, because the mean of its divisors is an integer number (1311251625).

Almost surely, 2^18493503448 is an apocalyptic number.

It is an amenable number.

18493503448 is an abundant number, since it is smaller than the sum of its proper divisors (23466548552).

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

18493503448 is a wasteful number, since it uses less digits than its factorization.

18493503448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19425979 (or 19425975 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 18493503448 in words is "eighteen billion, four hundred ninety-three million, five hundred three thousand, four hundred forty-eight".