18264544871 has 2 divisors, whose sum is σ = 18264544872. Its totient is φ = 18264544870.

The previous prime is 18264544801. The next prime is 18264544889. The reversal of 18264544871 is 17844546281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18264544871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18264544801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9132272435 + 9132272436.

It is an arithmetic number, because the mean of its divisors is an integer number (9132272436).

Almost surely, 2^18264544871 is an apocalyptic number.

18264544871 is a deficient number, since it is larger than the sum of its proper divisors (1).

18264544871 is an equidigital number, since it uses as much as digits as its factorization.

18264544871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1720320, while the sum is 50.

The spelling of 18264544871 in words is "eighteen billion, two hundred sixty-four million, five hundred forty-four thousand, eight hundred seventy-one".