18279472 has 30 divisors (see below), whose sum is σ = 36463812. Its totient is φ = 8872416.

The previous prime is 18279461. The next prime is 18279479. The reversal of 18279472 is 27497281.

It is not an unprimeable number, because it can be changed into a prime (18279479) 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 5 ways as a sum of consecutive naturals, for example, 112063 + ... + 112225.

Almost surely, 2^18279472 is an apocalyptic number.

It is an amenable number.

18279472 is a deficient number, since it is larger than the sum of its proper divisors (18184340).

18279472 is an equidigital number, since it uses as much as digits as its factorization.

18279472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 208 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 18279472 is about 4275.4499178449. The cubic root of 18279472 is about 263.4235201782.

The spelling of 18279472 in words is "eighteen million, two hundred seventy-nine thousand, four hundred seventy-two".