18120937 has 2 divisors, whose sum is σ = 18120938. Its totient is φ = 18120936.

The previous prime is 18120919. The next prime is 18120959. The reversal of 18120937 is 73902181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17943696 + 177241 = 4236^2 + 421^2 .

It is a cyclic number.

It is not a de Polignac number, because 18120937 - 2²³ = 9732329 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18120899 and 18120908.

It is not a weakly prime, because it can be changed into another prime (18120967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9060468 + 9060469.

It is an arithmetic number, because the mean of its divisors is an integer number (9060469).

Almost surely, 2^18120937 is an apocalyptic number.

It is an amenable number.

18120937 is a deficient number, since it is larger than the sum of its proper divisors (1).

18120937 is an equidigital number, since it uses as much as digits as its factorization.

18120937 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 31.

The square root of 18120937 is about 4256.8693895867. The cubic root of 18120937 is about 262.6597642705.

The spelling of 18120937 in words is "eighteen million, one hundred twenty thousand, nine hundred thirty-seven".