18340636 has 12 divisors (see below), whose sum is σ = 32258800. Its totient is φ = 9123840.

The previous prime is 18340631. The next prime is 18340639. The reversal of 18340636 is 63604381.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18340598 and 18340607.

It is a congruent number.

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, 10725 + ... + 12316.

Almost surely, 2^18340636 is an apocalyptic number.

It is an amenable number.

18340636 is a deficient number, since it is larger than the sum of its proper divisors (13918164).

18340636 is a wasteful number, since it uses less digits than its factorization.

18340636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23244 (or 23242 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 18340636 is about 4282.5968757286. The cubic root of 18340636 is about 263.7170023782.

The spelling of 18340636 in words is "eighteen million, three hundred forty thousand, six hundred thirty-six".