18744106 has 4 divisors (see below), whose sum is σ = 28116162. Its totient is φ = 9372052.

The previous prime is 18744097. The next prime is 18744107. The reversal of 18744106 is 60144781.

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

It can be written as a sum of positive squares in only one way, i.e., 17514225 + 1229881 = 4185^2 + 1109^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18744107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4686025 + ... + 4686028.

Almost surely, 2^18744106 is an apocalyptic number.

18744106 is a deficient number, since it is larger than the sum of its proper divisors (9372056).

18744106 is an equidigital number, since it uses as much as digits as its factorization.

18744106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372055.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18744106 is about 4329.4463849319. The cubic root of 18744106 is about 265.6368024467.

Adding to 18744106 its reverse (60144781), we get a palindrome (78888887).

The spelling of 18744106 in words is "eighteen million, seven hundred forty-four thousand, one hundred six".