19703997601 has 2 divisors, whose sum is σ = 19703997602. Its totient is φ = 19703997600.

The previous prime is 19703997583. The next prime is 19703997613. The reversal of 19703997601 is 10679930791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19559421025 + 144576576 = 139855^2 + 12024^2 .

It is a cyclic number.

It is not a de Polignac number, because 19703997601 - 2⁵ = 19703997569 is a prime.

It is not a weakly prime, because it can be changed into another prime (19703997641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9851998800 + 9851998801.

It is an arithmetic number, because the mean of its divisors is an integer number (9851998801).

Almost surely, 2^19703997601 is an apocalyptic number.

It is an amenable number.

19703997601 is a deficient number, since it is larger than the sum of its proper divisors (1).

19703997601 is an equidigital number, since it uses as much as digits as its factorization.

19703997601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 642978, while the sum is 52.

The spelling of 19703997601 in words is "nineteen billion, seven hundred three million, nine hundred ninety-seven thousand, six hundred one".