18268849 has 2 divisors, whose sum is σ = 18268850. Its totient is φ = 18268848.

The previous prime is 18268807. The next prime is 18268891. The reversal of 18268849 is 94886281.

It is a balanced prime because it is at equal distance from previous prime (18268807) and next prime (18268891).

It can be written as a sum of positive squares in only one way, i.e., 17640000 + 628849 = 4200^2 + 793^2 .

It is a cyclic number.

It is not a de Polignac number, because 18268849 - 2⁷ = 18268721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18268799 and 18268808.

It is not a weakly prime, because it can be changed into another prime (18260849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9134424 + 9134425.

It is an arithmetic number, because the mean of its divisors is an integer number (9134425).

Almost surely, 2^18268849 is an apocalyptic number.

It is an amenable number.

18268849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18268849 is an equidigital number, since it uses as much as digits as its factorization.

18268849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 46.

The square root of 18268849 is about 4274.2074119069. The cubic root of 18268849 is about 263.3724813169.

The spelling of 18268849 in words is "eighteen million, two hundred sixty-eight thousand, eight hundred forty-nine".