18268646 has 16 divisors (see below), whose sum is σ = 30386448. Its totient is φ = 8167200.

The previous prime is 18268643. The next prime is 18268661. The reversal of 18268646 is 64686281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18268643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5465 + ... + 8148.

It is an arithmetic number, because the mean of its divisors is an integer number (1899153).

Almost surely, 2^18268646 is an apocalyptic number.

18268646 is a deficient number, since it is larger than the sum of its proper divisors (12117802).

18268646 is a wasteful number, since it uses less digits than its factorization.

18268646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13687.

The product of its digits is 110592, while the sum is 41.

The square root of 18268646 is about 4274.1836647482. The cubic root of 18268646 is about 263.3715057982.

The spelling of 18268646 in words is "eighteen million, two hundred sixty-eight thousand, six hundred forty-six".