19814489 has 2 divisors, whose sum is σ = 19814490. Its totient is φ = 19814488.

The previous prime is 19814461. The next prime is 19814497. The reversal of 19814489 is 98441891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 6250000 = 3683^2 + 2500^2 .

It is a cyclic number.

It is not a de Polignac number, because 19814489 - 2⁸ = 19814233 is a prime.

It is a super-3 number, since 3×19814489³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19814429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9907244 + 9907245.

It is an arithmetic number, because the mean of its divisors is an integer number (9907245).

Almost surely, 2^19814489 is an apocalyptic number.

It is an amenable number.

19814489 is a deficient number, since it is larger than the sum of its proper divisors (1).

19814489 is an equidigital number, since it uses as much as digits as its factorization.

19814489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 44.

The square root of 19814489 is about 4451.3468748234. The cubic root of 19814489 is about 270.5998961365.

The spelling of 19814489 in words is "nineteen million, eight hundred fourteen thousand, four hundred eighty-nine".