18866705012 has 6 divisors (see below), whose sum is σ = 33016733778. Its totient is φ = 9433352504.

The previous prime is 18866704973. The next prime is 18866705027. The reversal of 18866705012 is 21050766881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18866121316 + 583696 = 137354^2 + 764^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2358338123 + ... + 2358338130.

It is an arithmetic number, because the mean of its divisors is an integer number (5502788963).

Almost surely, 2^18866705012 is an apocalyptic number.

It is an amenable number.

18866705012 is a deficient number, since it is larger than the sum of its proper divisors (14150028766).

18866705012 is a wasteful number, since it uses less digits than its factorization.

18866705012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716676257 (or 4716676255 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 18866705012 in words is "eighteen billion, eight hundred sixty-six million, seven hundred five thousand, twelve".