18854474 has 4 divisors (see below), whose sum is σ = 28281714. Its totient is φ = 9427236.

The previous prime is 18854461. The next prime is 18854477. The reversal of 18854474 is 47445881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17698849 + 1155625 = 4207^2 + 1075^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18854477) 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 as a sum of consecutive naturals, namely, 4713617 + ... + 4713620.

Almost surely, 2^18854474 is an apocalyptic number.

18854474 is a deficient number, since it is larger than the sum of its proper divisors (9427240).

18854474 is an equidigital number, since it uses as much as digits as its factorization.

18854474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9427239.

The product of its digits is 143360, while the sum is 41.

The square root of 18854474 is about 4342.1738795216. The cubic root of 18854474 is about 266.1571517524.

The spelling of 18854474 in words is "eighteen million, eight hundred fifty-four thousand, four hundred seventy-four".