18844057 has 2 divisors, whose sum is σ = 18844058. Its totient is φ = 18844056.

The previous prime is 18844043. The next prime is 18844073. The reversal of 18844057 is 75044881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18352656 + 491401 = 4284^2 + 701^2 .

It is a cyclic number.

It is not a de Polignac number, because 18844057 - 2¹¹ = 18842009 is a prime.

It is not a weakly prime, because it can be changed into another prime (18844027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9422028 + 9422029.

It is an arithmetic number, because the mean of its divisors is an integer number (9422029).

Almost surely, 2^18844057 is an apocalyptic number.

It is an amenable number.

18844057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18844057 is an equidigital number, since it uses as much as digits as its factorization.

18844057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 18844057 is about 4340.9741994165. The cubic root of 18844057 is about 266.1081259029.

The spelling of 18844057 in words is "eighteen million, eight hundred forty-four thousand, fifty-seven".