19838507701 has 2 divisors, whose sum is σ = 19838507702. Its totient is φ = 19838507700.

The previous prime is 19838507669. The next prime is 19838507707. The reversal of 19838507701 is 10770583891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11634858225 + 8203649476 = 107865^2 + 90574^2 .

It is an emirp because it is prime and its reverse (10770583891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19838507701 - 2⁵ = 19838507669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19838507707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9919253850 + 9919253851.

It is an arithmetic number, because the mean of its divisors is an integer number (9919253851).

Almost surely, 2^19838507701 is an apocalyptic number.

It is an amenable number.

19838507701 is a deficient number, since it is larger than the sum of its proper divisors (1).

19838507701 is an equidigital number, since it uses as much as digits as its factorization.

19838507701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 49.

The spelling of 19838507701 in words is "nineteen billion, eight hundred thirty-eight million, five hundred seven thousand, seven hundred one".