18340634 has 8 divisors (see below), whose sum is σ = 29627220. Its totient is φ = 8464896.

The previous prime is 18340631. The next prime is 18340639. The reversal of 18340634 is 43604381.

It can be written as a sum of positive squares in 2 ways, for example, as 13300609 + 5040025 = 3647^2 + 2245^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 18340597 and 18340606.

It is not an unprimeable number, because it can be changed into a prime (18340631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352679 + ... + 352730.

Almost surely, 2^18340634 is an apocalyptic number.

18340634 is a deficient number, since it is larger than the sum of its proper divisors (11286586).

18340634 is a wasteful number, since it uses less digits than its factorization.

18340634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705424.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 18340634 is about 4282.5966422254. The cubic root of 18340634 is about 263.7169927923.

The spelling of 18340634 in words is "eighteen million, three hundred forty thousand, six hundred thirty-four".