18855453 has 4 divisors (see below), whose sum is σ = 25140608. Its totient is φ = 12570300.

The previous prime is 18855407. The next prime is 18855479. The reversal of 18855453 is 35455881.

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 18855453 - 2⁸ = 18855197 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 (18855493) 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, 3142573 + ... + 3142578.

It is an arithmetic number, because the mean of its divisors is an integer number (6285152).

Almost surely, 2^18855453 is an apocalyptic number.

It is an amenable number.

18855453 is a deficient number, since it is larger than the sum of its proper divisors (6285155).

18855453 is an equidigital number, since it uses as much as digits as its factorization.

18855453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285154.

The product of its digits is 96000, while the sum is 39.

The square root of 18855453 is about 4342.2866096102. The cubic root of 18855453 is about 266.1617583220.

The spelling of 18855453 in words is "eighteen million, eight hundred fifty-five thousand, four hundred fifty-three".