18374245 has 4 divisors (see below), whose sum is σ = 22049100. Its totient is φ = 14699392.

The previous prime is 18374243. The next prime is 18374269. The reversal of 18374245 is 54247381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54247381 = 43 ⋅1261567.

It can be written as a sum of positive squares in 2 ways, for example, as 8844676 + 9529569 = 2974^2 + 3087^2 .

It is a cyclic number.

It is not a de Polignac number, because 18374245 - 2¹ = 18374243 is a prime.

It is a super-2 number, since 2×18374245² = 675225758640050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18374245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18374243) 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, 1837420 + ... + 1837429.

It is an arithmetic number, because the mean of its divisors is an integer number (5512275).

Almost surely, 2^18374245 is an apocalyptic number.

It is an amenable number.

18374245 is a deficient number, since it is larger than the sum of its proper divisors (3674855).

18374245 is an equidigital number, since it uses as much as digits as its factorization.

18374245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674854.

The product of its digits is 26880, while the sum is 34.

The square root of 18374245 is about 4286.5189839776. The cubic root of 18374245 is about 263.8779901850.

The spelling of 18374245 in words is "eighteen million, three hundred seventy-four thousand, two hundred forty-five".