19858735313 has 2 divisors, whose sum is σ = 19858735314. Its totient is φ = 19858735312.

The previous prime is 19858735243. The next prime is 19858735327. The reversal of 19858735313 is 31353785891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11523593104 + 8335142209 = 107348^2 + 91297^2 .

It is an emirp because it is prime and its reverse (31353785891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19858735313 - 2²⁸ = 19590299857 is a prime.

It is not a weakly prime, because it can be changed into another prime (19858731313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9929367656 + 9929367657.

It is an arithmetic number, because the mean of its divisors is an integer number (9929367657).

Almost surely, 2^19858735313 is an apocalyptic number.

It is an amenable number.

19858735313 is a deficient number, since it is larger than the sum of its proper divisors (1).

19858735313 is an equidigital number, since it uses as much as digits as its factorization.

19858735313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 53.

The spelling of 19858735313 in words is "nineteen billion, eight hundred fifty-eight million, seven hundred thirty-five thousand, three hundred thirteen".