18383818201911 has 24 divisors (see below), whose sum is σ = 27289041175760. Its totient is φ = 11917227275136.

The previous prime is 18383818201909. The next prime is 18383818201919. The reversal of 18383818201911 is 11910281838381.

18383818201911 is a `hidden beast` number, since 18 + 38 + 381 + 8 + 201 + 9 + 11 = 666.

It is not a de Polignac number, because 18383818201911 - 2¹ = 18383818201909 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18383818201919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16619785 + ... + 17691378.

Almost surely, 2^{18383818201911} is an apocalyptic number.

18383818201911 is a deficient number, since it is larger than the sum of its proper divisors (8905222973849).

18383818201911 is a wasteful number, since it uses less digits than its factorization.

18383818201911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34312815 (or 34312812 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 54.

The spelling of 18383818201911 in words is "eighteen trillion, three hundred eighty-three billion, eight hundred eighteen million, two hundred one thousand, nine hundred eleven".