18621285271 has 2 divisors, whose sum is σ = 18621285272. Its totient is φ = 18621285270.

The previous prime is 18621285269. The next prime is 18621285317. The reversal of 18621285271 is 17258212681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18621285271 - 2¹ = 18621285269 is a prime.

Together with 18621285269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18621285071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9310642635 + 9310642636.

It is an arithmetic number, because the mean of its divisors is an integer number (9310642636).

Almost surely, 2^18621285271 is an apocalyptic number.

18621285271 is a deficient number, since it is larger than the sum of its proper divisors (1).

18621285271 is an equidigital number, since it uses as much as digits as its factorization.

18621285271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 43.

The spelling of 18621285271 in words is "eighteen billion, six hundred twenty-one million, two hundred eighty-five thousand, two hundred seventy-one".