18813017 has 2 divisors, whose sum is σ = 18813018. Its totient is φ = 18813016.

The previous prime is 18813013. The next prime is 18813023. The reversal of 18813017 is 71031881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17774656 + 1038361 = 4216^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 18813017 - 2² = 18813013 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18813013) 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 as a sum of consecutive naturals, namely, 9406508 + 9406509.

It is an arithmetic number, because the mean of its divisors is an integer number (9406509).

Almost surely, 2^18813017 is an apocalyptic number.

It is an amenable number.

18813017 is a deficient number, since it is larger than the sum of its proper divisors (1).

18813017 is an equidigital number, since it uses as much as digits as its factorization.

18813017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 18813017 is about 4337.3974915841. The cubic root of 18813017 is about 265.9619341764.

Adding to 18813017 its reverse (71031881), we get a palindrome (89844898).

The spelling of 18813017 in words is "eighteen million, eight hundred thirteen thousand, seventeen".