19717960601 has 2 divisors, whose sum is σ = 19717960602. Its totient is φ = 19717960600.

The previous prime is 19717960597. The next prime is 19717960621. The reversal of 19717960601 is 10606971791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18494640025 + 1223320576 = 135995^2 + 34976^2 .

It is a cyclic number.

It is not a de Polignac number, because 19717960601 - 2² = 19717960597 is a prime.

It is not a weakly prime, because it can be changed into another prime (19717960621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9858980300 + 9858980301.

It is an arithmetic number, because the mean of its divisors is an integer number (9858980301).

Almost surely, 2^19717960601 is an apocalyptic number.

It is an amenable number.

19717960601 is a deficient number, since it is larger than the sum of its proper divisors (1).

19717960601 is an equidigital number, since it uses as much as digits as its factorization.

19717960601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 47.

The spelling of 19717960601 in words is "nineteen billion, seven hundred seventeen million, nine hundred sixty thousand, six hundred one".