18644712716 has 24 divisors (see below), whose sum is σ = 37658633376. Its totient is φ = 7911475200.

The previous prime is 18644712707. The next prime is 18644712721. The reversal of 18644712716 is 61721744681.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3293621 + ... + 3299276.

It is an arithmetic number, because the mean of its divisors is an integer number (1569109724).

Almost surely, 2^18644712716 is an apocalyptic number.

It is an amenable number.

18644712716 is an abundant number, since it is smaller than the sum of its proper divisors (19013920660).

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

18644712716 is a wasteful number, since it uses less digits than its factorization.

18644712716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6593009 (or 6593007 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The spelling of 18644712716 in words is "eighteen billion, six hundred forty-four million, seven hundred twelve thousand, seven hundred sixteen".