18604491471 has 12 divisors (see below), whose sum is σ = 27009568872. Its totient is φ = 12340033776.

The previous prime is 18604491463. The next prime is 18604491487. The reversal of 18604491471 is 17419440681.

18604491471 is a `hidden beast` number, since 1 + 8 + 60 + 449 + 147 + 1 = 666.

It is not a de Polignac number, because 18604491471 - 2³ = 18604491463 is a prime.

It is a super-3 number, since 3×18604491471³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18604493471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5244841 + ... + 5248386.

It is an arithmetic number, because the mean of its divisors is an integer number (2250797406).

Almost surely, 2^18604491471 is an apocalyptic number.

18604491471 is a deficient number, since it is larger than the sum of its proper divisors (8405077401).

18604491471 is a wasteful number, since it uses less digits than its factorization.

18604491471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10493430 (or 10493427 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 18604491471 in words is "eighteen billion, six hundred four million, four hundred ninety-one thousand, four hundred seventy-one".