18326260867 has 4 divisors (see below), whose sum is σ = 18326537200. Its totient is φ = 18325984536.

The previous prime is 18326260861. The next prime is 18326260903. The reversal of 18326260867 is 76806262381.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(18326260867) divides (18326260867-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18326260867 is a prime.

It is a deceptive number, since it divides R_18326260866.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18326260867.

It is not an unprimeable number, because it can be changed into a prime (18326260861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27634 + ... + 193432.

It is an arithmetic number, because the mean of its divisors is an integer number (4581634300).

Almost surely, 2^18326260867 is an apocalyptic number.

18326260867 is the 110533-rd pentagonal number.

18326260867 is a deficient number, since it is larger than the sum of its proper divisors (276333).

18326260867 is a wasteful number, since it uses less digits than its factorization.

18326260867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276332.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 18326260867 in words is "eighteen billion, three hundred twenty-six million, two hundred sixty thousand, eight hundred sixty-seven".