18206718126216 has 64 divisors (see below), whose sum is σ = 45596115259200. Its totient is φ = 6058331209728.

The previous prime is 18206718126197. The next prime is 18206718126229. The reversal of 18206718126216 is 61262181760281.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459061795 + ... + 459101453.

It is an arithmetic number, because the mean of its divisors is an integer number (712439300925).

Almost surely, 2^{18206718126216} is an apocalyptic number.

It is an amenable number.

18206718126216 is an abundant number, since it is smaller than the sum of its proper divisors (27389397132984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18206718126216 is a wasteful number, since it uses less digits than its factorization.

18206718126216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72518 (or 72514 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 51.

Adding to 18206718126216 its reverse (61262181760281), we get a palindrome (79468899886497).

The spelling of 18206718126216 in words is "eighteen trillion, two hundred six billion, seven hundred eighteen million, one hundred twenty-six thousand, two hundred sixteen".