18446249 has 2 divisors, whose sum is σ = 18446250. Its totient is φ = 18446248.

The previous prime is 18446243. The next prime is 18446251. The reversal of 18446249 is 94264481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 6091024 = 3515^2 + 2468^2 .

It is a cyclic number.

It is not a de Polignac number, because 18446249 - 2¹² = 18442153 is a prime.

Together with 18446251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18446243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9223124 + 9223125.

It is an arithmetic number, because the mean of its divisors is an integer number (9223125).

Almost surely, 2^18446249 is an apocalyptic number.

It is an amenable number.

18446249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18446249 is an equidigital number, since it uses as much as digits as its factorization.

18446249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 38.

The square root of 18446249 is about 4294.9096614481. The cubic root of 18446249 is about 264.2222311886. Note that the first 4 decimals are identical.

The spelling of 18446249 in words is "eighteen million, four hundred forty-six thousand, two hundred forty-nine".