18186668464 has 40 divisors (see below), whose sum is σ = 35919232272. Its totient is φ = 8917359360.

The previous prime is 18186668449. The next prime is 18186668503. The reversal of 18186668464 is 46486668181.

It is a junction number, because it is equal to n+sod(n) for n = 18186668399 and 18186668408.

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, 2311962 + ... + 2319814.

Almost surely, 2^18186668464 is an apocalyptic number.

It is an amenable number.

18186668464 is a deficient number, since it is larger than the sum of its proper divisors (17732563808).

18186668464 is a wasteful number, since it uses less digits than its factorization.

18186668464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10645 (or 10639 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 58.

The spelling of 18186668464 in words is "eighteen billion, one hundred eighty-six million, six hundred sixty-eight thousand, four hundred sixty-four".