18306453 has 48 divisors (see below), whose sum is σ = 29111040. Its totient is φ = 10200960.

The previous prime is 18306451. The next prime is 18306473. The reversal of 18306453 is 35460381.

It is not a de Polignac number, because 18306453 - 2¹ = 18306451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18306453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18306451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 389476 + ... + 389522.

It is an arithmetic number, because the mean of its divisors is an integer number (606480).

Almost surely, 2^18306453 is an apocalyptic number.

It is an amenable number.

18306453 is a deficient number, since it is larger than the sum of its proper divisors (10804587).

18306453 is a wasteful number, since it uses less digits than its factorization.

18306453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 18306453 is about 4278.6040947954. The cubic root of 18306453 is about 263.5530632333.

The spelling of 18306453 in words is "eighteen million, three hundred six thousand, four hundred fifty-three".