18180453 has 4 divisors (see below), whose sum is σ = 24240608. Its totient is φ = 12120300.

The previous prime is 18180439. The next prime is 18180469. The reversal of 18180453 is 35408181.

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.

It is not a de Polignac number, because 18180453 - 2⁶ = 18180389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18180453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18180413) 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, 3030073 + ... + 3030078.

It is an arithmetic number, because the mean of its divisors is an integer number (6060152).

Almost surely, 2^18180453 is an apocalyptic number.

It is an amenable number.

18180453 is a deficient number, since it is larger than the sum of its proper divisors (6060155).

18180453 is an equidigital number, since it uses as much as digits as its factorization.

18180453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060154.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 18180453 is about 4263.8542423493. The cubic root of 18180453 is about 262.9470079781.

The spelling of 18180453 in words is "eighteen million, one hundred eighty thousand, four hundred fifty-three".