18087669695 has 4 divisors (see below), whose sum is σ = 21705203640. Its totient is φ = 14470135752.

The previous prime is 18087669689. The next prime is 18087669697. The reversal of 18087669695 is 59696678081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59696678081 = 181 ⋅329815901.

It is a cyclic number.

It is not a de Polignac number, because 18087669695 - 2¹⁸ = 18087407551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18087669697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1808766965 + ... + 1808766974.

It is an arithmetic number, because the mean of its divisors is an integer number (5426300910).

Almost surely, 2^18087669695 is an apocalyptic number.

18087669695 is a deficient number, since it is larger than the sum of its proper divisors (3617533945).

18087669695 is an equidigital number, since it uses as much as digits as its factorization.

18087669695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617533944.

The product of its (nonzero) digits is 39191040, while the sum is 65.

The spelling of 18087669695 in words is "eighteen billion, eighty-seven million, six hundred sixty-nine thousand, six hundred ninety-five".