18668840248 has 32 divisors (see below), whose sum is σ = 36293796000. Its totient is φ = 8991964800.

The previous prime is 18668840231. The next prime is 18668840273. The reversal of 18668840248 is 84204886681.

It is a happy number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 10198 + ... + 193498.

It is an arithmetic number, because the mean of its divisors is an integer number (1134181125).

Almost surely, 2^18668840248 is an apocalyptic number.

It is an amenable number.

18668840248 is a deficient number, since it is larger than the sum of its proper divisors (17624955752).

18668840248 is a wasteful number, since it uses less digits than its factorization.

18668840248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183775 (or 183771 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 55.

The spelling of 18668840248 in words is "eighteen billion, six hundred sixty-eight million, eight hundred forty thousand, two hundred forty-eight".