18668355071 has 4 divisors (see below), whose sum is σ = 18670054200. Its totient is φ = 18666655944.

The previous prime is 18668355011. The next prime is 18668355073. The reversal of 18668355071 is 17055386681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17055386681 = 41 ⋅415985041.

It is a cyclic number.

It is not a de Polignac number, because 18668355071 - 2¹⁴ = 18668338687 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 (18668355073) 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, 832976 + ... + 855093.

It is an arithmetic number, because the mean of its divisors is an integer number (4667513550).

Almost surely, 2^18668355071 is an apocalyptic number.

18668355071 is a deficient number, since it is larger than the sum of its proper divisors (1699129).

18668355071 is a wasteful number, since it uses less digits than its factorization.

18668355071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699128.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 18668355071 in words is "eighteen billion, six hundred sixty-eight million, three hundred fifty-five thousand, seventy-one".