18306037 has 2 divisors, whose sum is σ = 18306038. Its totient is φ = 18306036.

The previous prime is 18306017. The next prime is 18306053. The reversal of 18306037 is 73060381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11383876 + 6922161 = 3374^2 + 2631^2 .

It is a cyclic number.

It is not a de Polignac number, because 18306037 - 2⁷ = 18305909 is a prime.

It is a super-2 number, since 2×18306037² = 670221981290738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18305996 and 18306014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18306017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9153018 + 9153019.

It is an arithmetic number, because the mean of its divisors is an integer number (9153019).

Almost surely, 2^18306037 is an apocalyptic number.

It is an amenable number.

18306037 is a deficient number, since it is larger than the sum of its proper divisors (1).

18306037 is an equidigital number, since it uses as much as digits as its factorization.

18306037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 18306037 is about 4278.5554805331. Note that the first 3 decimals coincide. The cubic root of 18306037 is about 263.5510668716.

It can be divided in two parts, 1 and 8306037, that added together give a palindrome (8306038).

The spelling of 18306037 in words is "eighteen million, three hundred six thousand, thirty-seven".