18297472 has 16 divisors (see below), whose sum is σ = 36452250. Its totient is φ = 9148672.

The previous prime is 18297469. The next prime is 18297497. The reversal of 18297472 is 27479281.

It can be written as a sum of positive squares in only one way, i.e., 15555136 + 2742336 = 3944^2 + 1656^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71347 + ... + 71602.

Almost surely, 2^18297472 is an apocalyptic number.

It is an amenable number.

18297472 is a deficient number, since it is larger than the sum of its proper divisors (18154778).

18297472 is an equidigital number, since it uses as much as digits as its factorization.

18297472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142963 (or 142951 counting only the distinct ones).

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

The square root of 18297472 is about 4277.5544415004. The cubic root of 18297472 is about 263.5099571723.

It can be divided in two parts, 18297 and 472, that added together give a square (18769 = 137²).

The spelling of 18297472 in words is "eighteen million, two hundred ninety-seven thousand, four hundred seventy-two".