18643364 has 12 divisors (see below), whose sum is σ = 32993100. Its totient is φ = 9216768.

The previous prime is 18643343. The next prime is 18643367. The reversal of 18643364 is 46334681.

It can be written as a sum of positive squares in 2 ways, for example, as 8352100 + 10291264 = 2890^2 + 3208^2 .

It is not an unprimeable number, because it can be changed into a prime (18643367) 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, 25829 + ... + 26540.

It is an arithmetic number, because the mean of its divisors is an integer number (2749425).

Almost surely, 2^18643364 is an apocalyptic number.

It is an amenable number.

18643364 is a deficient number, since it is larger than the sum of its proper divisors (14349736).

18643364 is a wasteful number, since it uses less digits than its factorization.

18643364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52462 (or 52460 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 18643364 is about 4317.7961971358. The cubic root of 18643364 is about 265.1600504619.

The spelling of 18643364 in words is "eighteen million, six hundred forty-three thousand, three hundred sixty-four".