19782437699 has 2 divisors, whose sum is σ = 19782437700. Its totient is φ = 19782437698.

The previous prime is 19782437687. The next prime is 19782437707. The reversal of 19782437699 is 99673428791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19782437699 - 2⁴ = 19782437683 is a prime.

It is not a weakly prime, because it can be changed into another prime (19782437399) 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, 9891218849 + 9891218850.

It is an arithmetic number, because the mean of its divisors is an integer number (9891218850).

Almost surely, 2^19782437699 is an apocalyptic number.

19782437699 is a deficient number, since it is larger than the sum of its proper divisors (1).

19782437699 is an equidigital number, since it uses as much as digits as its factorization.

19782437699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41150592, while the sum is 65.

The spelling of 19782437699 in words is "nineteen billion, seven hundred eighty-two million, four hundred thirty-seven thousand, six hundred ninety-nine".