19701193709 has 2 divisors, whose sum is σ = 19701193710. Its totient is φ = 19701193708.

The previous prime is 19701193669. The next prime is 19701193763. The reversal of 19701193709 is 90739110791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19692508900 + 8684809 = 140330^2 + 2947^2 .

It is a cyclic number.

It is not a de Polignac number, because 19701193709 - 2⁸ = 19701193453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19701193769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9850596854 + 9850596855.

It is an arithmetic number, because the mean of its divisors is an integer number (9850596855).

Almost surely, 2^19701193709 is an apocalyptic number.

It is an amenable number.

19701193709 is a deficient number, since it is larger than the sum of its proper divisors (1).

19701193709 is an equidigital number, since it uses as much as digits as its factorization.

19701193709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107163, while the sum is 47.

The spelling of 19701193709 in words is "nineteen billion, seven hundred one million, one hundred ninety-three thousand, seven hundred nine".