18499274 has 16 divisors (see below), whose sum is σ = 30218400. Its totient is φ = 8460144.

The previous prime is 18499231. The next prime is 18499277. The reversal of 18499274 is 47299481.

It is not an unprimeable number, because it can be changed into a prime (18499277) 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 7 ways as a sum of consecutive naturals, for example, 7292 + ... + 9495.

It is an arithmetic number, because the mean of its divisors is an integer number (1888650).

Almost surely, 2^18499274 is an apocalyptic number.

18499274 is a deficient number, since it is larger than the sum of its proper divisors (11719126).

18499274 is a wasteful number, since it uses less digits than its factorization.

18499274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16837.

The product of its digits is 145152, while the sum is 44.

The square root of 18499274 is about 4301.0782369076. The cubic root of 18499274 is about 264.4751639231.

The spelling of 18499274 in words is "eighteen million, four hundred ninety-nine thousand, two hundred seventy-four".