18645786836 has 12 divisors (see below), whose sum is σ = 33089706720. Its totient is φ = 9191584920.

The previous prime is 18645786829. The next prime is 18645786839. The reversal of 18645786836 is 63868754681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18645786839) by changing a digit.

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, 32826806 + ... + 32827373.

It is an arithmetic number, because the mean of its divisors is an integer number (2757475560).

Almost surely, 2^18645786836 is an apocalyptic number.

It is an amenable number.

18645786836 is a deficient number, since it is larger than the sum of its proper divisors (14443919884).

18645786836 is a wasteful number, since it uses less digits than its factorization.

18645786836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65654254 (or 65654252 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 62.

The spelling of 18645786836 in words is "eighteen billion, six hundred forty-five million, seven hundred eighty-six thousand, eight hundred thirty-six".