18668643311 has 8 divisors (see below), whose sum is σ = 18722805504. Its totient is φ = 18614540160.

The previous prime is 18668643281. The next prime is 18668643337. The reversal of 18668643311 is 11334686681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18668643311 - 2¹⁰ = 18668642287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18668643341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663026 + ... + 690608.

It is an arithmetic number, because the mean of its divisors is an integer number (2340350688).

Almost surely, 2^18668643311 is an apocalyptic number.

18668643311 is a deficient number, since it is larger than the sum of its proper divisors (54162193).

18668643311 is a wasteful number, since it uses less digits than its factorization.

18668643311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29521.

The product of its digits is 497664, while the sum is 47.

The spelling of 18668643311 in words is "eighteen billion, six hundred sixty-eight million, six hundred forty-three thousand, three hundred eleven".