19796549 has 2 divisors, whose sum is σ = 19796550. Its totient is φ = 19796548.

The previous prime is 19796533. The next prime is 19796561. The reversal of 19796549 is 94569791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15856324 + 3940225 = 3982^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 19796549 - 2⁴ = 19796533 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 19796497 and 19796506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19796509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9898274 + 9898275.

It is an arithmetic number, because the mean of its divisors is an integer number (9898275).

Almost surely, 2^19796549 is an apocalyptic number.

It is an amenable number.

19796549 is a deficient number, since it is larger than the sum of its proper divisors (1).

19796549 is an equidigital number, since it uses as much as digits as its factorization.

19796549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 50.

The square root of 19796549 is about 4449.3312980717. The cubic root of 19796549 is about 270.5182046030.

The spelling of 19796549 in words is "nineteen million, seven hundred ninety-six thousand, five hundred forty-nine".