18744111 has 6 divisors (see below), whose sum is σ = 27074840. Its totient is φ = 12496068.

The previous prime is 18744109. The next prime is 18744113. The reversal of 18744111 is 11144781.

It is an interprime number because it is at equal distance from previous prime (18744109) and next prime (18744113).

It is not a de Polignac number, because 18744111 - 2¹ = 18744109 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 (18744113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1041331 + ... + 1041348.

Almost surely, 2^18744111 is an apocalyptic number.

18744111 is a deficient number, since it is larger than the sum of its proper divisors (8330729).

18744111 is a wasteful number, since it uses less digits than its factorization.

18744111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082685 (or 2082682 counting only the distinct ones).

The product of its digits is 896, while the sum is 27.

The square root of 18744111 is about 4329.4469623729. The cubic root of 18744111 is about 265.6368260663.

Adding to 18744111 its reverse (11144781), we get a palindrome (29888892).

The spelling of 18744111 in words is "eighteen million, seven hundred forty-four thousand, one hundred eleven".