18805253 has 8 divisors (see below), whose sum is σ = 19532280. Its totient is φ = 18083520.

The previous prime is 18805243. The next prime is 18805261. The reversal of 18805253 is 35250881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1682209 + 17123044 = 1297^2 + 4138^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18805253 - 2⁸ = 18804997 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 (18805223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6863 + ... + 9203.

It is an arithmetic number, because the mean of its divisors is an integer number (2441535).

Almost surely, 2^18805253 is an apocalyptic number.

It is an amenable number.

18805253 is a deficient number, since it is larger than the sum of its proper divisors (727027).

18805253 is a wasteful number, since it uses less digits than its factorization.

18805253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 18805253 is about 4336.5023924818. The cubic root of 18805253 is about 265.9253422680.

The spelling of 18805253 in words is "eighteen million, eight hundred five thousand, two hundred fifty-three".