18213466 has 8 divisors (see below), whose sum is σ = 27414324. Its totient is φ = 9075360.

The previous prime is 18213463. The next prime is 18213497. The reversal of 18213466 is 66431281.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17682025 + 531441 = 4205^2 + 729^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18213463) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 14955 + ... + 16126.

Almost surely, 2^18213466 is an apocalyptic number.

18213466 is a deficient number, since it is larger than the sum of its proper divisors (9200858).

18213466 is a wasteful number, since it uses less digits than its factorization.

18213466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31376.

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

The square root of 18213466 is about 4267.7237492603. The cubic root of 18213466 is about 263.1060692989.

The spelling of 18213466 in words is "eighteen million, two hundred thirteen thousand, four hundred sixty-six".