16018813 has 2 divisors, whose sum is σ = 16018814. Its totient is φ = 16018812.

The previous prime is 16018801. The next prime is 16018819. The reversal of 16018813 is 31881061.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16016004 + 2809 = 4002^2 + 53^2 .

It is an emirp because it is prime and its reverse (31881061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16018813 - 2⁵ = 16018781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16018819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8009406 + 8009407.

It is an arithmetic number, because the mean of its divisors is an integer number (8009407).

Almost surely, 2^16018813 is an apocalyptic number.

It is an amenable number.

16018813 is a deficient number, since it is larger than the sum of its proper divisors (1).

16018813 is an equidigital number, since it uses as much as digits as its factorization.

16018813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 16018813 is about 4002.3509341386. The cubic root of 16018813 is about 252.0829333570.

Adding to 16018813 its reverse (31881061), we get a palindrome (47899874).

The spelling of 16018813 in words is "sixteen million, eighteen thousand, eight hundred thirteen".