18136073 has 2 divisors, whose sum is σ = 18136074. Its totient is φ = 18136072.

The previous prime is 18136061. The next prime is 18136087. The reversal of 18136073 is 37063181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14341369 + 3794704 = 3787^2 + 1948^2 .

It is an emirp because it is prime and its reverse (37063181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18136073 - 2¹² = 18131977 is a prime.

It is a super-2 number, since 2×18136073² = 657834287722658, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_1159427 and since 18136073 and 1159427 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (18136003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9068036 + 9068037.

It is an arithmetic number, because the mean of its divisors is an integer number (9068037).

Almost surely, 2^18136073 is an apocalyptic number.

It is an amenable number.

18136073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18136073 is an equidigital number, since it uses as much as digits as its factorization.

18136073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 18136073 is about 4258.6468508201. The cubic root of 18136073 is about 262.7328751291.

The spelling of 18136073 in words is "eighteen million, one hundred thirty-six thousand, seventy-three".