18722253 has 32 divisors (see below), whose sum is σ = 30108672. Its totient is φ = 10208000.

The previous prime is 18722191. The next prime is 18722267. The reversal of 18722253 is 35222781.

It is not a de Polignac number, because 18722253 - 2¹⁰ = 18721229 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18722253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18722273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12178 + ... + 13628.

It is an arithmetic number, because the mean of its divisors is an integer number (940896).

Almost surely, 2^18722253 is an apocalyptic number.

It is an amenable number.

18722253 is a deficient number, since it is larger than the sum of its proper divisors (11386419).

18722253 is a wasteful number, since it uses less digits than its factorization.

18722253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505.

The product of its digits is 6720, while the sum is 30.

The square root of 18722253 is about 4326.9218851280. The cubic root of 18722253 is about 265.5335305448.

The spelling of 18722253 in words is "eighteen million, seven hundred twenty-two thousand, two hundred fifty-three".