18493204 has 6 divisors (see below), whose sum is σ = 32363114. Its totient is φ = 9246600.

The previous prime is 18493199. The next prime is 18493207. The reversal of 18493204 is 40239481.

It can be written as a sum of positive squares in only one way, i.e., 12588304 + 5904900 = 3548^2 + 2430^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18493207) 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 as a sum of consecutive naturals, namely, 2311647 + ... + 2311654.

Almost surely, 2^18493204 is an apocalyptic number.

It is an amenable number.

18493204 is a deficient number, since it is larger than the sum of its proper divisors (13869910).

18493204 is a wasteful number, since it uses less digits than its factorization.

18493204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4623305 (or 4623303 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18493204 is about 4300.3725420014. The cubic root of 18493204 is about 264.4462341417.

The spelling of 18493204 in words is "eighteen million, four hundred ninety-three thousand, two hundred four".