18424253 has 4 divisors (see below), whose sum is σ = 18852768. Its totient is φ = 17995740.

The previous prime is 18424247. The next prime is 18424267. The reversal of 18424253 is 35242481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35242481 = 439 ⋅80279.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18424253 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 (18424213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214193 + ... + 214278.

It is an arithmetic number, because the mean of its divisors is an integer number (4713192).

Almost surely, 2^18424253 is an apocalyptic number.

It is an amenable number.

18424253 is a deficient number, since it is larger than the sum of its proper divisors (428515).

18424253 is an equidigital number, since it uses as much as digits as its factorization.

18424253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428514.

The product of its digits is 7680, while the sum is 29.

The square root of 18424253 is about 4292.3481918409. The cubic root of 18424253 is about 264.1171665797.

The spelling of 18424253 in words is "eighteen million, four hundred twenty-four thousand, two hundred fifty-three".