18594225 has 72 divisors (see below), whose sum is σ = 37214880. Its totient is φ = 9097920.

The previous prime is 18594223. The next prime is 18594227. The reversal of 18594225 is 52249581.

It is an interprime number because it is at equal distance from previous prime (18594223) and next prime (18594227).

It is not a de Polignac number, because 18594225 - 2¹ = 18594223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18594225.

It is not an unprimeable number, because it can be changed into a prime (18594223) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 113994 + ... + 114156.

Almost surely, 2^18594225 is an apocalyptic number.

18594225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18594225 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

18594225 is a wasteful number, since it uses less digits than its factorization.

18594225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 184 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 18594225 is about 4312.1021555617. The cubic root of 18594225 is about 264.9268814528.

It can be divided in two parts, 1859 and 4225, that added together give a square (6084 = 78²).

The spelling of 18594225 in words is "eighteen million, five hundred ninety-four thousand, two hundred twenty-five".