19418249 has 2 divisors, whose sum is σ = 19418250. Its totient is φ = 19418248.

The previous prime is 19418227. The next prime is 19418251. The reversal of 19418249 is 94281491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12475024 + 6943225 = 3532^2 + 2635^2 .

It is an emirp because it is prime and its reverse (94281491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19418249 - 2¹⁶ = 19352713 is a prime.

Together with 19418251, 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 (19418549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9709124 + 9709125.

It is an arithmetic number, because the mean of its divisors is an integer number (9709125).

Almost surely, 2^19418249 is an apocalyptic number.

It is an amenable number.

19418249 is a deficient number, since it is larger than the sum of its proper divisors (1).

19418249 is an equidigital number, since it uses as much as digits as its factorization.

19418249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 19418249 is about 4406.6142331727. The cubic root of 19418249 is about 268.7839644112.

The spelling of 19418249 in words is "nineteen million, four hundred eighteen thousand, two hundred forty-nine".