18188354648 has 16 divisors (see below), whose sum is σ = 34126689960. Its totient is φ = 9087904000.

The previous prime is 18188354617. The next prime is 18188354671. The reversal of 18188354648 is 84645388181.

It is a junction number, because it is equal to n+sod(n) for n = 18188354593 and 18188354602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771833 + ... + 795048.

Almost surely, 2^18188354648 is an apocalyptic number.

It is an amenable number.

18188354648 is a deficient number, since it is larger than the sum of its proper divisors (15938335312).

18188354648 is a wasteful number, since it uses less digits than its factorization.

18188354648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568338 (or 1568334 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 56.

The spelling of 18188354648 in words is "eighteen billion, one hundred eighty-eight million, three hundred fifty-four thousand, six hundred forty-eight".