18344185861111 has 8 divisors (see below), whose sum is σ = 20050249567248. Its totient is φ = 16644523896000.

The previous prime is 18344185861103. The next prime is 18344185861117. The reversal of 18344185861111 is 11116858144381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18344185861111 - 2³ = 18344185861103 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 (18344185861117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1600429260 + ... + 1600440721.

It is an arithmetic number, because the mean of its divisors is an integer number (2506281195906).

Almost surely, 2^{18344185861111} is an apocalyptic number.

18344185861111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18344185861111 is a deficient number, since it is larger than the sum of its proper divisors (1706063706137).

18344185861111 is a wasteful number, since it uses less digits than its factorization.

18344185861111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200870513.

The product of its digits is 737280, while the sum is 52.

The spelling of 18344185861111 in words is "eighteen trillion, three hundred forty-four billion, one hundred eighty-five million, eight hundred sixty-one thousand, one hundred eleven".