18666049964 has 24 divisors (see below), whose sum is σ = 33796224000. Its totient is φ = 9011359440.

The previous prime is 18666049891. The next prime is 18666049991. The reversal of 18666049964 is 46994066681.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

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, 117014 + ... + 225885.

It is an arithmetic number, because the mean of its divisors is an integer number (1408176000).

Almost surely, 2^18666049964 is an apocalyptic number.

It is an amenable number.

18666049964 is a deficient number, since it is larger than the sum of its proper divisors (15130174036).

18666049964 is a wasteful number, since it uses less digits than its factorization.

18666049964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343373 (or 343371 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 59.

The spelling of 18666049964 in words is "eighteen billion, six hundred sixty-six million, forty-nine thousand, nine hundred sixty-four".