18454271771 has 16 divisors (see below), whose sum is σ = 20947066560. Its totient is φ = 16136964480.

The previous prime is 18454271741. The next prime is 18454271779. The reversal of 18454271771 is 17717245481.

It is not a de Polignac number, because 18454271771 - 2²⁶ = 18387162907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18454271779) 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, 441815 + ... + 481776.

It is an arithmetic number, because the mean of its divisors is an integer number (1309191660).

Almost surely, 2^18454271771 is an apocalyptic number.

18454271771 is a deficient number, since it is larger than the sum of its proper divisors (2492794789).

18454271771 is a wasteful number, since it uses less digits than its factorization.

18454271771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923686.

The product of its digits is 439040, while the sum is 47.

The spelling of 18454271771 in words is "eighteen billion, four hundred fifty-four million, two hundred seventy-one thousand, seven hundred seventy-one".