18063813 has 16 divisors (see below), whose sum is σ = 25459200. Its totient is φ = 11360880.

The previous prime is 18063797. The next prime is 18063833. The reversal of 18063813 is 31836081.

It is not a de Polignac number, because 18063813 - 2⁴ = 18063797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18063833) 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 15 ways as a sum of consecutive naturals, for example, 17218 + ... + 18236.

It is an arithmetic number, because the mean of its divisors is an integer number (1591200).

Almost surely, 2^18063813 is an apocalyptic number.

It is an amenable number.

18063813 is a deficient number, since it is larger than the sum of its proper divisors (7395387).

18063813 is a wasteful number, since it uses less digits than its factorization.

18063813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18063813 is about 4250.1544677811. The cubic root of 18063813 is about 262.3834729964.

Adding to 18063813 its reverse (31836081), we get a palindrome (49899894).

The spelling of 18063813 in words is "eighteen million, sixty-three thousand, eight hundred thirteen".