18665911064 has 16 divisors (see below), whose sum is σ = 35047957200. Its totient is φ = 9319789152.

The previous prime is 18665911063. The next prime is 18665911067. The reversal of 18665911064 is 46011956681.

It is a super-2 number, since 2×18665911064² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18665911063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1639772 + ... + 1651115.

It is an arithmetic number, because the mean of its divisors is an integer number (2190497325).

Almost surely, 2^18665911064 is an apocalyptic number.

It is an amenable number.

18665911064 is a deficient number, since it is larger than the sum of its proper divisors (16382046136).

18665911064 is a wasteful number, since it uses less digits than its factorization.

18665911064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291602 (or 3291598 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 18665911064 in words is "eighteen billion, six hundred sixty-five million, nine hundred eleven thousand, sixty-four".