18716849 has 2 divisors, whose sum is σ = 18716850. Its totient is φ = 18716848.

The previous prime is 18716837. The next prime is 18716899. The reversal of 18716849 is 94861781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12250000 + 6466849 = 3500^2 + 2543^2 .

It is a cyclic number.

It is not a de Polignac number, because 18716849 - 2¹⁶ = 18651313 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (18716899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9358424 + 9358425.

It is an arithmetic number, because the mean of its divisors is an integer number (9358425).

Almost surely, 2^18716849 is an apocalyptic number.

It is an amenable number.

18716849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18716849 is an equidigital number, since it uses as much as digits as its factorization.

18716849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The square root of 18716849 is about 4326.2973776660. The cubic root of 18716849 is about 265.5079801782.

The spelling of 18716849 in words is "eighteen million, seven hundred sixteen thousand, eight hundred forty-nine".