19814089 has 2 divisors, whose sum is σ = 19814090. Its totient is φ = 19814088.

The previous prime is 19814083. The next prime is 19814101. The reversal of 19814089 is 98041891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19713600 + 100489 = 4440^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 19814089 - 2⁵ = 19814057 is a prime.

It is a super-3 number, since 3×19814089³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (19814083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9907044 + 9907045.

It is an arithmetic number, because the mean of its divisors is an integer number (9907045).

Almost surely, 2^19814089 is an apocalyptic number.

It is an amenable number.

19814089 is a deficient number, since it is larger than the sum of its proper divisors (1).

19814089 is an equidigital number, since it uses as much as digits as its factorization.

19814089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 19814089 is about 4451.3019443754. The cubic root of 19814089 is about 270.5980752352.

The spelling of 19814089 in words is "nineteen million, eight hundred fourteen thousand, eighty-nine".