18383728290911 has 4 divisors (see below), whose sum is σ = 18466166534592. Its totient is φ = 18301290047232.

The previous prime is 18383728290869. The next prime is 18383728290937. The reversal of 18383728290911 is 11909282738381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18383728290911 - 2¹⁰ = 18383728289887 is a prime.

It is a super-2 number, since 2×18383728290911² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18383728296911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41219121506 + ... + 41219121951.

It is an arithmetic number, because the mean of its divisors is an integer number (4616541633648).

Almost surely, 2^{18383728290911} is an apocalyptic number.

18383728290911 is a deficient number, since it is larger than the sum of its proper divisors (82438243681).

18383728290911 is an equidigital number, since it uses as much as digits as its factorization.

18383728290911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82438243680.

The product of its (nonzero) digits is 10450944, while the sum is 62.

The spelling of 18383728290911 in words is "eighteen trillion, three hundred eighty-three billion, seven hundred twenty-eight million, two hundred ninety thousand, nine hundred eleven".