18063313 has 4 divisors (see below), whose sum is σ = 18195300. Its totient is φ = 17931328.

The previous prime is 18063293. The next prime is 18063341. The reversal of 18063313 is 31336081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31336081 = 7 ⋅4476583.

It can be written as a sum of positive squares in 2 ways, for example, as 3873024 + 14190289 = 1968^2 + 3767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18063313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18063343) 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, 65788 + ... + 66061.

It is an arithmetic number, because the mean of its divisors is an integer number (4548825).

Almost surely, 2^18063313 is an apocalyptic number.

It is an amenable number.

18063313 is a deficient number, since it is larger than the sum of its proper divisors (131987).

18063313 is a wasteful number, since it uses less digits than its factorization.

18063313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131986.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 18063313 is about 4250.0956459826. The cubic root of 18063313 is about 262.3810520800.

Adding to 18063313 its reverse (31336081), we get a palindrome (49399394).

The spelling of 18063313 in words is "eighteen million, sixty-three thousand, three hundred thirteen".