18665490860 has 12 divisors (see below), whose sum is σ = 39197530848. Its totient is φ = 7466196336.

The previous prime is 18665490859. The next prime is 18665490911. The reversal of 18665490860 is 6809456681.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466637252 + ... + 466637291.

It is an arithmetic number, because the mean of its divisors is an integer number (3266460904).

Almost surely, 2^18665490860 is an apocalyptic number.

18665490860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18665490860 is an abundant number, since it is smaller than the sum of its proper divisors (20532039988).

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

18665490860 is a wasteful number, since it uses less digits than its factorization.

18665490860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933274552 (or 933274550 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 18665490860 in words is "eighteen billion, six hundred sixty-five million, four hundred ninety thousand, eight hundred sixty".