18448361 has 2 divisors, whose sum is σ = 18448362. Its totient is φ = 18448360.

The previous prime is 18448307. The next prime is 18448387. The reversal of 18448361 is 16384481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17305600 + 1142761 = 4160^2 + 1069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18448361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18448301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9224180 + 9224181.

It is an arithmetic number, because the mean of its divisors is an integer number (9224181).

Almost surely, 2^18448361 is an apocalyptic number.

It is an amenable number.

18448361 is a deficient number, since it is larger than the sum of its proper divisors (1).

18448361 is an equidigital number, since it uses as much as digits as its factorization.

18448361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 35.

The square root of 18448361 is about 4295.1555268698. The cubic root of 18448361 is about 264.2323148295.

The spelling of 18448361 in words is "eighteen million, four hundred forty-eight thousand, three hundred sixty-one".