19772519653993 has 2 divisors, whose sum is σ = 19772519653994. Its totient is φ = 19772519653992.

The previous prime is 19772519653883. The next prime is 19772519654009. The reversal of 19772519653993 is 39935691527791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17103749806224 + 2668769847769 = 4135668^2 + 1633637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19772519653993 is a prime.

It is not a weakly prime, because it can be changed into another prime (19772519653193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9886259826996 + 9886259826997.

It is an arithmetic number, because the mean of its divisors is an integer number (9886259826997).

Almost surely, 2^{19772519653993} is an apocalyptic number.

It is an amenable number.

19772519653993 is a deficient number, since it is larger than the sum of its proper divisors (1).

19772519653993 is an equidigital number, since it uses as much as digits as its factorization.

19772519653993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 868020300, while the sum is 76.

The spelling of 19772519653993 in words is "nineteen trillion, seven hundred seventy-two billion, five hundred nineteen million, six hundred fifty-three thousand, nine hundred ninety-three".