18604361 has 2 divisors, whose sum is σ = 18604362. Its totient is φ = 18604360.

The previous prime is 18604349. The next prime is 18604373. The reversal of 18604361 is 16340681.

It is a balanced prime because it is at equal distance from previous prime (18604349) and next prime (18604373).

It can be written as a sum of positive squares in only one way, i.e., 17480761 + 1123600 = 4181^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 18604361 - 2⁶ = 18604297 is a prime.

It is a super-2 number, since 2×18604361² = 692244496436642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18604321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9302180 + 9302181.

It is an arithmetic number, because the mean of its divisors is an integer number (9302181).

Almost surely, 2^18604361 is an apocalyptic number.

It is an amenable number.

18604361 is a deficient number, since it is larger than the sum of its proper divisors (1).

18604361 is an equidigital number, since it uses as much as digits as its factorization.

18604361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 18604361 is about 4313.2772922686. The cubic root of 18604361 is about 264.9750112903.

The spelling of 18604361 in words is "eighteen million, six hundred four thousand, three hundred sixty-one".