19702974899 has 2 divisors, whose sum is σ = 19702974900. Its totient is φ = 19702974898.

The previous prime is 19702974871. The next prime is 19702974931. The reversal of 19702974899 is 99847920791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19702974899 - 2²⁰ = 19701926323 is a prime.

It is not a weakly prime, because it can be changed into another prime (19702974299) 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, 9851487449 + 9851487450.

It is an arithmetic number, because the mean of its divisors is an integer number (9851487450).

Almost surely, 2^19702974899 is an apocalyptic number.

19702974899 is a deficient number, since it is larger than the sum of its proper divisors (1).

19702974899 is an equidigital number, since it uses as much as digits as its factorization.

19702974899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20575296, while the sum is 65.

The spelling of 19702974899 in words is "nineteen billion, seven hundred two million, nine hundred seventy-four thousand, eight hundred ninety-nine".