18374369 has 4 divisors (see below), whose sum is σ = 19787796. Its totient is φ = 16960944.

The previous prime is 18374329. The next prime is 18374383. The reversal of 18374369 is 96347381.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10975969 + 7398400 = 3313^2 + 2720^2 .

It is not a de Polignac number, because 18374369 - 2⁸ = 18374113 is a prime.

It is a super-2 number, since 2×18374369² = 675234872296322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18374329) 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, 706694 + ... + 706719.

It is an arithmetic number, because the mean of its divisors is an integer number (4946949).

Almost surely, 2^18374369 is an apocalyptic number.

It is an amenable number.

18374369 is a deficient number, since it is larger than the sum of its proper divisors (1413427).

18374369 is a wasteful number, since it uses less digits than its factorization.

18374369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413426.

The product of its digits is 108864, while the sum is 41.

The square root of 18374369 is about 4286.5334479040. The cubic root of 18374369 is about 263.8785837839.

The spelling of 18374369 in words is "eighteen million, three hundred seventy-four thousand, three hundred sixty-nine".