18130453 has 4 divisors (see below), whose sum is σ = 19778688. Its totient is φ = 16482220.

The previous prime is 18130451. The next prime is 18130459. The reversal of 18130453 is 35403181.

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: 35403181 = 11 ⋅3218471.

It is a cyclic number.

It is not a de Polignac number, because 18130453 - 2¹ = 18130451 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 (18130451) 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, 824101 + ... + 824122.

It is an arithmetic number, because the mean of its divisors is an integer number (4944672).

Almost surely, 2^18130453 is an apocalyptic number.

It is an amenable number.

18130453 is a deficient number, since it is larger than the sum of its proper divisors (1648235).

18130453 is a wasteful number, since it uses less digits than its factorization.

18130453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648234.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 18130453 is about 4257.9869656917. The cubic root of 18130453 is about 262.7057338014.

The spelling of 18130453 in words is "eighteen million, one hundred thirty thousand, four hundred fifty-three".