19757693983 has 2 divisors, whose sum is σ = 19757693984. Its totient is φ = 19757693982.

The previous prime is 19757693957. The next prime is 19757694013. The reversal of 19757693983 is 38939675791.

It is a weak prime.

It is an emirp because it is prime and its reverse (38939675791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19757693983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19757693953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9878846991 + 9878846992.

It is an arithmetic number, because the mean of its divisors is an integer number (9878846992).

Almost surely, 2^19757693983 is an apocalyptic number.

19757693983 is a deficient number, since it is larger than the sum of its proper divisors (1).

19757693983 is an equidigital number, since it uses as much as digits as its factorization.

19757693983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77157360, while the sum is 67.

The spelling of 19757693983 in words is "nineteen billion, seven hundred fifty-seven million, six hundred ninety-three thousand, nine hundred eighty-three".