18186744495 has 32 divisors (see below), whose sum is σ = 29981011392. Its totient is φ = 9407204352.

The previous prime is 18186744491. The next prime is 18186744497. The reversal of 18186744495 is 59444768181.

It is not a de Polignac number, because 18186744495 - 2² = 18186744491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18186744491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121369 + ... + 226061.

It is an arithmetic number, because the mean of its divisors is an integer number (936906606).

Almost surely, 2^18186744495 is an apocalyptic number.

18186744495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18186744495 is a deficient number, since it is larger than the sum of its proper divisors (11794266897).

18186744495 is a wasteful number, since it uses less digits than its factorization.

18186744495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105051.

The product of its digits is 7741440, while the sum is 57.

The spelling of 18186744495 in words is "eighteen billion, one hundred eighty-six million, seven hundred forty-four thousand, four hundred ninety-five".