18372253 has 6 divisors (see below), whose sum is σ = 18773726. Its totient is φ = 17979192.

The previous prime is 18372241. The next prime is 18372269. The reversal of 18372253 is 35227381.

It can be written as a sum of positive squares in only one way, i.e., 18292729 + 79524 = 4277^2 + 282^2 .

It is not a de Polignac number, because 18372253 - 2⁹ = 18371741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18372953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1950 + ... + 6367.

Almost surely, 2^18372253 is an apocalyptic number.

It is an amenable number.

18372253 is a deficient number, since it is larger than the sum of its proper divisors (401473).

18372253 is an frugal number, since it uses more digits than its factorization.

18372253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8411 (or 8364 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 18372253 is about 4286.2866213075. The cubic root of 18372253 is about 263.8684539391.

The spelling of 18372253 in words is "eighteen million, three hundred seventy-two thousand, two hundred fifty-three".