18455249 has 2 divisors, whose sum is σ = 18455250. Its totient is φ = 18455248.

The previous prime is 18455221. The next prime is 18455263. The reversal of 18455249 is 94255481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14326225 + 4129024 = 3785^2 + 2032^2 .

It is a cyclic number.

It is not a de Polignac number, because 18455249 - 2¹⁶ = 18389713 is a prime.

It is not a weakly prime, because it can be changed into another prime (18455209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9227624 + 9227625.

It is an arithmetic number, because the mean of its divisors is an integer number (9227625).

Almost surely, 2^18455249 is an apocalyptic number.

It is an amenable number.

18455249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18455249 is an equidigital number, since it uses as much as digits as its factorization.

18455249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 38.

The square root of 18455249 is about 4295.9572856349. The cubic root of 18455249 is about 264.2651959026.

The spelling of 18455249 in words is "eighteen million, four hundred fifty-five thousand, two hundred forty-nine".