18461918271 has 16 divisors (see below), whose sum is σ = 26350646400. Its totient is φ = 11462527008.

The previous prime is 18461918261. The next prime is 18461918287. The reversal of 18461918271 is 17281916481.

It is not a de Polignac number, because 18461918271 - 2⁵ = 18461918239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18461918271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18461918261) 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, 2741496 + ... + 2748221.

It is an arithmetic number, because the mean of its divisors is an integer number (1646915400).

Almost surely, 2^18461918271 is an apocalyptic number.

18461918271 is a deficient number, since it is larger than the sum of its proper divisors (7888728129).

18461918271 is a wasteful number, since it uses less digits than its factorization.

18461918271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5489798.

The product of its digits is 193536, while the sum is 48.

The spelling of 18461918271 in words is "eighteen billion, four hundred sixty-one million, nine hundred eighteen thousand, two hundred seventy-one".