18383820201816 has 64 divisors (see below), whose sum is σ = 46740413664000. Its totient is φ = 6024319593600.

The previous prime is 18383820201667. The next prime is 18383820201823. The reversal of 18383820201816 is 61810202838381.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 14861790 + ... + 16051181.

It is an arithmetic number, because the mean of its divisors is an integer number (730318963500).

Almost surely, 2^{18383820201816} is an apocalyptic number.

It is an amenable number.

18383820201816 is an abundant number, since it is smaller than the sum of its proper divisors (28356593462184).

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

18383820201816 is a wasteful number, since it uses less digits than its factorization.

18383820201816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30913400 (or 30913396 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The spelling of 18383820201816 in words is "eighteen trillion, three hundred eighty-three billion, eight hundred twenty million, two hundred one thousand, eight hundred sixteen".