19713634337 has 2 divisors, whose sum is σ = 19713634338. Its totient is φ = 19713634336.

The previous prime is 19713634321. The next prime is 19713634387. The reversal of 19713634337 is 73343631791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10671716416 + 9041917921 = 103304^2 + 95089^2 .

It is an emirp because it is prime and its reverse (73343631791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19713634337 - 2⁴ = 19713634321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19713634291 and 19713634300.

It is not a weakly prime, because it can be changed into another prime (19713634307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9856817168 + 9856817169.

It is an arithmetic number, because the mean of its divisors is an integer number (9856817169).

Almost surely, 2^19713634337 is an apocalyptic number.

It is an amenable number.

19713634337 is a deficient number, since it is larger than the sum of its proper divisors (1).

19713634337 is an equidigital number, since it uses as much as digits as its factorization.

19713634337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 47.

The spelling of 19713634337 in words is "nineteen billion, seven hundred thirteen million, six hundred thirty-four thousand, three hundred thirty-seven".