18744001 has 4 divisors (see below), whose sum is σ = 19179952. Its totient is φ = 18308052.

The previous prime is 18743999. The next prime is 18744041. The reversal of 18744001 is 10044781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10044781 = 2297 ⋅4373.

It is a cyclic number.

It is not a de Polignac number, because 18744001 - 2¹ = 18743999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18744041) 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, 217911 + ... + 217996.

It is an arithmetic number, because the mean of its divisors is an integer number (4794988).

Almost surely, 2^18744001 is an apocalyptic number.

It is an amenable number.

18744001 is a deficient number, since it is larger than the sum of its proper divisors (435951).

18744001 is an equidigital number, since it uses as much as digits as its factorization.

18744001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435950.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18744001 is about 4329.4342586532. The cubic root of 18744001 is about 265.6363064345.

Adding to 18744001 its reverse (10044781), we get a palindrome (28788782).

The spelling of 18744001 in words is "eighteen million, seven hundred forty-four thousand, one".