18624245 has 4 divisors (see below), whose sum is σ = 22349100. Its totient is φ = 14899392.

The previous prime is 18624241. The next prime is 18624259. The reversal of 18624245 is 54242681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54242681 = 5087 ⋅10663.

It can be written as a sum of positive squares in 2 ways, for example, as 2696164 + 15928081 = 1642^2 + 3991^2 .

It is a cyclic number.

It is not a de Polignac number, because 18624245 - 2² = 18624241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18624241) 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, 1862420 + ... + 1862429.

It is an arithmetic number, because the mean of its divisors is an integer number (5587275).

Almost surely, 2^18624245 is an apocalyptic number.

It is an amenable number.

18624245 is a deficient number, since it is larger than the sum of its proper divisors (3724855).

18624245 is an equidigital number, since it uses as much as digits as its factorization.

18624245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724854.

The product of its digits is 15360, while the sum is 32.

The square root of 18624245 is about 4315.5816525701. The cubic root of 18624245 is about 265.0693778242.

The spelling of 18624245 in words is "eighteen million, six hundred twenty-four thousand, two hundred forty-five".