18663976671 has 16 divisors (see below), whose sum is σ = 25134011136. Its totient is φ = 12318365376.

The previous prime is 18663976627. The next prime is 18663976673. The reversal of 18663976671 is 17667936681.

It is not a de Polignac number, because 18663976671 - 2¹⁰ = 18663975647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18663976673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1539891 + ... + 1551963.

It is an arithmetic number, because the mean of its divisors is an integer number (1570875696).

Almost surely, 2^18663976671 is an apocalyptic number.

18663976671 is a deficient number, since it is larger than the sum of its proper divisors (6470034465).

18663976671 is a wasteful number, since it uses less digits than its factorization.

18663976671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17182.

The product of its digits is 13716864, while the sum is 60.

The spelling of 18663976671 in words is "eighteen billion, six hundred sixty-three million, nine hundred seventy-six thousand, six hundred seventy-one".