18478145 has 24 divisors (see below), whose sum is σ = 25992000. Its totient is φ = 12573792.

The previous prime is 18478123. The next prime is 18478147. The reversal of 18478145 is 54187481.

It is a happy number.

It is not a de Polignac number, because 18478145 - 2⁶ = 18478081 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18478099 and 18478108.

It is not an unprimeable number, because it can be changed into a prime (18478147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48566 + ... + 48944.

It is an arithmetic number, because the mean of its divisors is an integer number (1083000).

Almost surely, 2^18478145 is an apocalyptic number.

It is an amenable number.

18478145 is a deficient number, since it is larger than the sum of its proper divisors (7513855).

18478145 is a wasteful number, since it uses less digits than its factorization.

18478145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597 (or 590 counting only the distinct ones).

The product of its digits is 35840, while the sum is 38.

The square root of 18478145 is about 4298.6212906000. The cubic root of 18478145 is about 264.3744352031.

The spelling of 18478145 in words is "eighteen million, four hundred seventy-eight thousand, one hundred forty-five".