18644067796 has 24 divisors (see below), whose sum is σ = 33394370240. Its totient is φ = 9102929472.

The previous prime is 18644067787. The next prime is 18644067887. The reversal of 18644067796 is 69776044681.

It is a self number, because there is not a number n which added to its sum of digits gives 18644067796.

It is a congruent number.

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, 807160 + ... + 829936.

Almost surely, 2^18644067796 is an apocalyptic number.

It is an amenable number.

18644067796 is a deficient number, since it is larger than the sum of its proper divisors (14750302444).

18644067796 is a wasteful number, since it uses less digits than its factorization.

18644067796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27583 (or 27581 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 58.

The spelling of 18644067796 in words is "eighteen billion, six hundred forty-four million, sixty-seven thousand, seven hundred ninety-six".