18665719052 has 6 divisors (see below), whose sum is σ = 32665008348. Its totient is φ = 9332859524.

The previous prime is 18665719003. The next prime is 18665719057. The reversal of 18665719052 is 25091756681.

It is not an unprimeable number, because it can be changed into a prime (18665719057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2333214878 + ... + 2333214885.

It is an arithmetic number, because the mean of its divisors is an integer number (5444168058).

Almost surely, 2^18665719052 is an apocalyptic number.

It is an amenable number.

18665719052 is a deficient number, since it is larger than the sum of its proper divisors (13999289296).

18665719052 is a wasteful number, since it uses less digits than its factorization.

18665719052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4666429767 (or 4666429765 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 50.

The spelling of 18665719052 in words is "eighteen billion, six hundred sixty-five million, seven hundred nineteen thousand, fifty-two".