18964368 has 50 divisors (see below), whose sum is σ = 54892134. Its totient is φ = 6321024.

The previous prime is 18964349. The next prime is 18964369. The reversal of 18964368 is 86346981.

It can be written as a sum of positive squares in only one way, i.e., 10036224 + 8928144 = 3168^2 + 2988^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18964369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6021 + ... + 8612.

Almost surely, 2^18964368 is an apocalyptic number.

18964368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18964368 is an abundant number, since it is smaller than the sum of its proper divisors (35927766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18964368 is a wasteful number, since it uses less digits than its factorization.

18964368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14653 (or 14638 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 18964368 is about 4354.8097547425. The cubic root of 18964368 is about 266.6732526151.

The spelling of 18964368 in words is "eighteen million, nine hundred sixty-four thousand, three hundred sixty-eight".