18007361 has 2 divisors, whose sum is σ = 18007362. Its totient is φ = 18007360.

The previous prime is 18007357. The next prime is 18007447. The reversal of 18007361 is 16370081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13359025 + 4648336 = 3655^2 + 2156^2 .

It is a cyclic number.

It is not a de Polignac number, because 18007361 - 2² = 18007357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18007361.

It is not a weakly prime, because it can be changed into another prime (18007061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9003680 + 9003681.

It is an arithmetic number, because the mean of its divisors is an integer number (9003681).

Almost surely, 2^18007361 is an apocalyptic number.

It is an amenable number.

18007361 is a deficient number, since it is larger than the sum of its proper divisors (1).

18007361 is an equidigital number, since it uses as much as digits as its factorization.

18007361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 18007361 is about 4243.5081006168. The cubic root of 18007361 is about 262.1098591400.

The spelling of 18007361 in words is "eighteen million, seven thousand, three hundred sixty-one".