18764338 has 4 divisors (see below), whose sum is σ = 28146510. Its totient is φ = 9382168.

The previous prime is 18764329. The next prime is 18764351. The reversal of 18764338 is 83346781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17867529 + 896809 = 4227^2 + 947^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 18764338.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4691083 + ... + 4691086.

Almost surely, 2^18764338 is an apocalyptic number.

18764338 is a deficient number, since it is larger than the sum of its proper divisors (9382172).

18764338 is an equidigital number, since it uses as much as digits as its factorization.

18764338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9382171.

The product of its digits is 96768, while the sum is 40.

The square root of 18764338 is about 4331.7823121667. The cubic root of 18764338 is about 265.7323423689.

The spelling of 18764338 in words is "eighteen million, seven hundred sixty-four thousand, three hundred thirty-eight".