18666824562 has 24 divisors (see below), whose sum is σ = 41014434240. Its totient is φ = 6134636760.

The previous prime is 18666824549. The next prime is 18666824573. The reversal of 18666824562 is 26542866681.

It is a junction number, because it is equal to n+sod(n) for n = 18666824499 and 18666824508.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7301862 + ... + 7304417.

It is an arithmetic number, because the mean of its divisors is an integer number (1708934760).

Almost surely, 2^18666824562 is an apocalyptic number.

18666824562 is an abundant number, since it is smaller than the sum of its proper divisors (22347609678).

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

18666824562 is a wasteful number, since it uses less digits than its factorization.

18666824562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14606358 (or 14606355 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 18666824562 in words is "eighteen billion, six hundred sixty-six million, eight hundred twenty-four thousand, five hundred sixty-two".