18008186443215 has 32 divisors (see below), whose sum is σ = 32113669950720. Its totient is φ = 8563645315584.

The previous prime is 18008186443213. The next prime is 18008186443223. The reversal of 18008186443215 is 51234468180081.

It is a happy number.

It is not a de Polignac number, because 18008186443215 - 2¹ = 18008186443213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18008186443213) 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 31 ways as a sum of consecutive naturals, for example, 1858425129 + ... + 1858434818.

It is an arithmetic number, because the mean of its divisors is an integer number (1003552185960).

Almost surely, 2^{18008186443215} is an apocalyptic number.

18008186443215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18008186443215 is a deficient number, since it is larger than the sum of its proper divisors (14105483507505).

18008186443215 is a wasteful number, since it uses less digits than its factorization.

18008186443215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716859991.

The product of its (nonzero) digits is 1474560, while the sum is 51.

The spelling of 18008186443215 in words is "eighteen trillion, eight billion, one hundred eighty-six million, four hundred forty-three thousand, two hundred fifteen".