19386663701 has 2 divisors, whose sum is σ = 19386663702. Its totient is φ = 19386663700.

The previous prime is 19386663679. The next prime is 19386663707. The reversal of 19386663701 is 10736668391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10844098225 + 8542565476 = 104135^2 + 92426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19386663701 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19386663701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19386663707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9693331850 + 9693331851.

It is an arithmetic number, because the mean of its divisors is an integer number (9693331851).

Almost surely, 2^19386663701 is an apocalyptic number.

It is an amenable number.

19386663701 is a deficient number, since it is larger than the sum of its proper divisors (1).

19386663701 is an equidigital number, since it uses as much as digits as its factorization.

19386663701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 50.

The spelling of 19386663701 in words is "nineteen billion, three hundred eighty-six million, six hundred sixty-three thousand, seven hundred one".