18381910001111 has 32 divisors (see below), whose sum is σ = 19077928833600. Its totient is φ = 17699876147200.

The previous prime is 18381910001071. The next prime is 18381910001129. The reversal of 18381910001111 is 11110001918381.

It is not a de Polignac number, because 18381910001111 - 2¹⁸ = 18381909738967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18381910001711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9669599261 + ... + 9669601161.

It is an arithmetic number, because the mean of its divisors is an integer number (596185276050).

Almost surely, 2^{18381910001111} is an apocalyptic number.

18381910001111 is a deficient number, since it is larger than the sum of its proper divisors (696018832489).

18381910001111 is a wasteful number, since it uses less digits than its factorization.

18381910001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5539.

The product of its (nonzero) digits is 1728, while the sum is 35.

Adding to 18381910001111 its reverse (11110001918381), we get a palindrome (29491911919492).

The spelling of 18381910001111 in words is "eighteen trillion, three hundred eighty-one billion, nine hundred ten million, one thousand, one hundred eleven".