19836797 has 2 divisors, whose sum is σ = 19836798. Its totient is φ = 19836796.

The previous prime is 19836767. The next prime is 19836799. The reversal of 19836797 is 79763891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15792676 + 4044121 = 3974^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 19836797 - 2⁸ = 19836541 is a prime.

Together with 19836799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19836799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9918398 + 9918399.

It is an arithmetic number, because the mean of its divisors is an integer number (9918399).

Almost surely, 2^19836797 is an apocalyptic number.

It is an amenable number.

19836797 is a deficient number, since it is larger than the sum of its proper divisors (1).

19836797 is an equidigital number, since it uses as much as digits as its factorization.

19836797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 50.

The square root of 19836797 is about 4453.8519283874. The cubic root of 19836797 is about 270.7014090328.

The spelling of 19836797 in words is "nineteen million, eight hundred thirty-six thousand, seven hundred ninety-seven".