18396036219816 has 32 divisors (see below), whose sum is σ = 51100100611200. Its totient is φ = 6132012073200.

The previous prime is 18396036219763. The next prime is 18396036219823. The reversal of 18396036219816 is 61891263069381.

18396036219816 is a `hidden beast` number, since 1 + 8 + 3 + 9 + 603 + 6 + 2 + 1 + 9 + 8 + 16 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42583416960 + ... + 42583417391.

It is an arithmetic number, because the mean of its divisors is an integer number (1596878144100).

Almost surely, 2^{18396036219816} is an apocalyptic number.

It is an amenable number.

18396036219816 is an abundant number, since it is smaller than the sum of its proper divisors (32704064391384).

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

18396036219816 is a wasteful number, since it uses less digits than its factorization.

18396036219816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85166834366 (or 85166834356 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The spelling of 18396036219816 in words is "eighteen trillion, three hundred ninety-six billion, thirty-six million, two hundred nineteen thousand, eight hundred sixteen".