18272245 has 16 divisors (see below), whose sum is σ = 22498560. Its totient is φ = 14241600.

The previous prime is 18272239. The next prime is 18272249. The reversal of 18272245 is 54227281.

It is a happy number.

It is not a de Polignac number, because 18272245 - 2¹⁷ = 18141173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18272249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42180 + ... + 42610.

It is an arithmetic number, because the mean of its divisors is an integer number (1406160).

Almost surely, 2^18272245 is an apocalyptic number.

It is an amenable number.

18272245 is a deficient number, since it is larger than the sum of its proper divisors (4226315).

18272245 is a wasteful number, since it uses less digits than its factorization.

18272245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its digits is 8960, while the sum is 31.

The square root of 18272245 is about 4274.6046600826. The cubic root of 18272245 is about 263.3887997602.

It can be divided in two parts, 182 and 72245, that added together give a palindrome (72427).

The spelling of 18272245 in words is "eighteen million, two hundred seventy-two thousand, two hundred forty-five".