18240466 has 4 divisors (see below), whose sum is σ = 27360702. Its totient is φ = 9120232.

The previous prime is 18240463. The next prime is 18240479. The reversal of 18240466 is 66404281.

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., 14220441 + 4020025 = 3771^2 + 2005^2 .

It is not an unprimeable number, because it can be changed into a prime (18240463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560115 + ... + 4560118.

Almost surely, 2^18240466 is an apocalyptic number.

18240466 is a deficient number, since it is larger than the sum of its proper divisors (9120236).

18240466 is an equidigital number, since it uses as much as digits as its factorization.

18240466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9120235.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 18240466 is about 4270.8858565876. The cubic root of 18240466 is about 263.2360163109.

The spelling of 18240466 in words is "eighteen million, two hundred forty thousand, four hundred sixty-six".