18446243 has 2 divisors, whose sum is σ = 18446244. Its totient is φ = 18446242.

The previous prime is 18446237. The next prime is 18446249. The reversal of 18446243 is 34264481.

It is a balanced prime because it is at equal distance from previous prime (18446237) and next prime (18446249).

It is an emirp because it is prime and its reverse (34264481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18446243 - 2⁴ = 18446227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18446249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9223121 + 9223122.

It is an arithmetic number, because the mean of its divisors is an integer number (9223122).

Almost surely, 2^18446243 is an apocalyptic number.

18446243 is a deficient number, since it is larger than the sum of its proper divisors (1).

18446243 is an equidigital number, since it uses as much as digits as its factorization.

18446243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 32.

The square root of 18446243 is about 4294.9089629467. The cubic root of 18446243 is about 264.2222025408. Note that the first 4 decimals are identical.

The spelling of 18446243 in words is "eighteen million, four hundred forty-six thousand, two hundred forty-three".