18811336 has 16 divisors (see below), whose sum is σ = 35585100. Its totient is φ = 9321984.

The previous prime is 18811313. The next prime is 18811337. The reversal of 18811336 is 63311881.

It can be written as a sum of positive squares in 2 ways, for example, as 15163236 + 3648100 = 3894^2 + 1910^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18811298 and 18811307.

It is not an unprimeable number, because it can be changed into a prime (18811337) 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 3 ways as a sum of consecutive naturals, for example, 9501 + ... + 11308.

Almost surely, 2^18811336 is an apocalyptic number.

It is an amenable number.

18811336 is a deficient number, since it is larger than the sum of its proper divisors (16773764).

18811336 is a wasteful number, since it uses less digits than its factorization.

18811336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20928 (or 20924 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 18811336 is about 4337.2037074595. The cubic root of 18811336 is about 265.9540124392.

The spelling of 18811336 in words is "eighteen million, eight hundred eleven thousand, three hundred thirty-six".