18472274 has 4 divisors (see below), whose sum is σ = 27708414. Its totient is φ = 9236136.

The previous prime is 18472261. The next prime is 18472291. The reversal of 18472274 is 47227481.

It is a happy number.

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., 18003049 + 469225 = 4243^2 + 685^2 .

It is an unprimeable number.

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, 4618067 + ... + 4618070.

Almost surely, 2^18472274 is an apocalyptic number.

18472274 is a deficient number, since it is larger than the sum of its proper divisors (9236140).

18472274 is an equidigital number, since it uses as much as digits as its factorization.

18472274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9236139.

The product of its digits is 25088, while the sum is 35.

The square root of 18472274 is about 4297.9383429733. The cubic root of 18472274 is about 264.3464326317.

The spelling of 18472274 in words is "eighteen million, four hundred seventy-two thousand, two hundred seventy-four".